The windows in the car fog up from the inside in winter. Sweating glass in the car - what to do? Practical advice from experienced motorists. How to prevent fogging windows

Even from the course of school physics, we remember what condensate is. It forms on glass and windows. Moreover, this happens not only due to the temperature difference between indoors and outdoors.

Very often you can see how droplets of moisture accumulate on the glass in winter. This is especially noticeable when the house has not been heated for a long time, and then the owners turn on all the heaters at once, and the windows fog up.

If we talk about a normal room, then the condensate has an extremely bad effect on the plaster. Under its action, even a brick is destroyed. It is not surprising that after several cold winters in the house, pieces of the walls begin to fall off.

In a car, things are completely different. It just fogs up the windows. At first glance, this is not such a significant problem. If you are sitting in the passenger seat and looking out the side window, you can always wipe the misted glass with your hand. It’s just worth falling asleep, and the droplets will turn into frost, which will be extremely difficult to remove.

The windshield is completely different. Firstly, the driver constantly has to be distracted by wiping the window. Secondly, it is very difficult to reach the second half of the glass.

As a result, the driver is left with two options: at the risk of losing control, wipe the glass, which begins to fog up, or stop. Of course, if there is a passenger, then you can ask him to remove moisture from the glass. But this option is not always available.

Fortunately, over almost 100 years of driving, motorists have been able to develop many methods to deal with fogging windows. For example, you can set special equipment, which will allow you to forget about this problem forever.

Why does the windshield in the car fog up

Some drivers think that the windshield in the car should not fog up, but this is absolutely not the case. It, like the rest of the car windows, lends itself to the accumulation of moisture. However, there is special equipment that allows you to avoid this. True, it is not installed in all machines.

To prevent the windows from fogging up in the car, you can install heating elements yourself. After such an operation, you will have excellent visibility not only behind, but also in front. And it will not be influenced by any factors.

More about condensation

To understand what countermeasures are most effective when the windows in the car fog up. Let us consider the process of condensation in more detail. The root cause of fogging glasses is water, more precisely, its vapors. Their content in the atmosphere varies depending on the climatic region, season and weather.

The simplest experiment is to breathe into the window for a few seconds. It immediately forms a whitish haze. Another good example is the bath. You have probably noticed more than once that while taking a shower, the glass fogs up.

Drops of water accumulate not only on the glass. If you look closely, you can find them on the walls as well. The thing is that on the surface of the glass they are best visible. Scientifically, this process is called condensation.

Condensation is the transition of a substance from one state to another. As a result of this movement, the windows in the car fog up. This is what happens when it cools down. The main indicator in this process is the dew point. So among meteorologists they call the temperature of maximum saturation of air with water. At this point, condensate is released.

The achievement of the dew point is largely dependent on the temperature and humidity of the air. The pattern is quite simple: the lower the humidity of the air, the lower the temperature must be in order for the glasses to fog up.

This dependence is best seen in the example of winter and summer. In summer the humidity is much higher. Therefore, the dew point can be reached at relatively high temperatures.

It is not surprising that the windows in the car fog up not only in winter, but also in summer. This happens as follows: the temperature outside is high, you turn on the air conditioner, and it starts blowing cold air into the cabin. The result is more than predictable - the windows begin to fog up.

Attention! When the car is in the sun for a long time, and inside the air conditioner is running at full capacity, the windows will fog up anyway.

In winter, the windows in the car fog up due to the completely opposite situation. The outside of the car is cold, but the inside is warm. Glasses are just on the verge of these two climatic zones.

In spring and autumn, in turn, the humidity in the air rises, and the windows fog up again. In fact, a motorist always needs to ride with a cloth and a passenger who will wipe his windshield. Fortunately, there are other, far more practical methods to get rid of the condensation that interferes with your view, including side windows.

Six ways to effectively deal with fogging windows

Setting up the climate system

So, modern cars are equipped with many operating modes, including climatic ones. That is why the first thing you should do when your windows are fogging up is to properly adjust the air conditioner.

You need to select the window blowing mode. In this case, the air flow should be directed specifically to the windows. To do this, it is enough to correctly turn the deflector grilles. It also doesn't hurt to raise the temperature a little. As a result, the windows in the car will not fog up.

A working air conditioner will dry the misted glass in a few minutes. Just do not forget to turn off the internal air circulation before doing this. Otherwise, all your efforts will be in vain.

In some cases, this method is not particularly effective. But that's not the hardware's fault. Most likely messed up cabin filter. Therefore, the air conditioner is not able to cope with heating and drying. Fix this problem so that the windows in the car stop fogging up.

Important! In wet and humid weather, the cabin air filter can draw in moisture. As a result, his work deteriorates significantly.

We use special tools

Do you remember the example of the mirror fogging up in the bathtub? There is a great way to deal with this problem. It is enough to wipe the glass with a cloth with soapy water, and moisture will stop accumulating. This technique is widely used in Japanese hotels. There, if you wash in the shower, the mirror will always be transparent.

Not surprisingly, there are a number of automotive chemicals that allow you to avoid fogging windows when applied. These funds are issued in the following forms:

• aerosols,
• liquid,
• napkins.

The principle of their work is identical. They change the surface tension of the window. A thin film is created on the glass, which is invisible to the naked eye. This is what keeps the windows from fogging up.

The smallest particles of water simply slide off inside, without lingering on the windows of the car. The product should be applied to clean, freshly washed and dried windows. Then you can avoid fogging the windows.

Anti-fogging agent is selected based on personal preference. You should choose a scent that won't irritate you, as well as a convenient method of application to the surface.

Folk methods

As automotive technology evolved, drivers also came up with their own alternative methods to help keep windows from fogging up. Some of them are very effective, but they are much cheaper.

In order to prevent fogging of windows, make a solution with the following proportions: one part glycerin to ten parts alcohol. It is not recommended to use only glycerin. Yes, this substance itself forms a protective film and helps to effectively deal with condensate. But there are also side effects.

If you use only glycerin as the main anti-fog on windows, the glass will become greasy. Divorces will appear on it. As a result, visibility is greatly reduced. It’s better not to think about night trips with such processing. The fact is that strong glare can interfere with the correct orientation at night on the road.

There are several other very popular folk methods for cleaning misted glass. You can use ordinary newspapers, and use them to rub the windows. Printing ink is able to create a very reliable protective film.

Important! When there is nothing at hand, but you need to go, take a simple tobacco and wipe the windows with it.

Window anti-fogging film

This anti-fogging solution is considered to be very cardinal, but it provides a stable and durable effect. A similar technology is used in motorcycle helmets, and it is worth noting that it is very effective.

Attention! The film is applied to fogging glasses in the same way as tinting.

Removing excess moisture

Sometimes the simplest solution is the best one. In order not to watch the windows in the car fog up, just lower the windows. The only disadvantage of this option is that after airing, it will be very difficult to restore the previous climatic balance inside the cabin.

Also, excess moisture is formed due to the ingress of water and snow into the cabin. As soon as the temperature inside rises, evaporation begins. As a result, the windows of the car fog up. To avoid this effect, you need to regularly apply excess moisture.

To prevent fogging of the windows, regularly remove ice from the floor mats. The floor in the car should not be wet. As a preventive measure, rugs should be dried periodically.

Attention! Sometimes a loose seal can cause raindrops or snow to get inside the machine. Because of this, the windows of the car will only fog up more.

Some drivers put newspapers on the floor, and as soon as they are soaked, they throw them away. This technique is not very effective, but still avoids fogging of glasses.

Important! Do not store wet rags in the car interior.

Well lowers humidity and allows to avoid misting of glasses usual salt. Just put the paper packaging on backseat. Salt crystals tend to attract moisture. A similar method will save you from condensate.

Don't speak

As strange as it may sound, the air we exhale also contributes to the fact that the windows in the car fog up. It is much warmer than in the cabin, and also contains a huge amount of moisture.

Accordingly, if you want the windows inside the cabin not to fog up, talk less. Fortunately, if you have a normal air conditioning system in your cabin, you can opt out of such drastic measures by setting the appropriate settings.

Results

As you can see, there are many methods that allow you to prevent the windows in the car from fogging up. Some require a lot of money to implement, while others cost almost nothing.

Good afternoon. In today's entry, I will tell you why windows fog up in a car, consider the mechanism of condensate formation, a troubleshooting algorithm that leads to condensate, and give folk methods for dealing with condensate. The ones I have given will allow you to quickly determine the malfunction and get to the place of repair even with a faulty heater.

How does condensation form on windows?

If you happened to walk in the early morning at the end of summer - the beginning of autumn, you could observe dew on the grass. Dew is the same condensate.

The scheme of its formation is as follows - atmospheric moisture is deposited on surfaces having a temperature below the dew point.

The temperature-humidity graph of dew falls looks like this:

Now imagine the interior of a car with passengers in the rain or winter.

A person exhales water vapor in large quantities. In winter, this is clearly visible:

Naturally, when the car is not moving (or when the ventilation system is not working), the amount of water vapor in the cabin air will increase.

With a decrease outdoor temperature, the inner surface of the glasses, inevitably becomes a place for moisture condensation, since its temperature is below the dew point.

If the heater is working properly, it constantly renews the air in the cabin, dries it and maintains the temperature on the glass surface above the dew point. Thus, with a good interior ventilation system, the windows do not fog up.

Why do windows fog up?

The reason has already been mentioned above - the glasses fog up, since the humidity is above the dew point, and the temperature on the glass surface is below the condensation point.

Please note that when you approach the car in the morning, its windows fog up and freeze from the outside, and if you turn off the heater when driving in the cold season, the windows will fog up and freeze from the inside.

Let's analyze the reasons for the increase in humidity in the cabin, and as a result of fogging of the windows (given by prevalence).

Clogged cabin filter.

For everyone modern cars installed cabin air filter. It is located in the heater and looks something like this:

Over time, the cabin filter becomes clogged, and the passage of air through it is difficult. Accordingly, the renewal of the air in the cabin slows down, and the humidity rises.

Symptoms of a clogged cabin filter:

• Weak air flow in all heater operating modes
• Hoarse hum of the cabin heater engine
• Glasses are fogged directly in places of blowing.

In general, the cabin filter is changed once a season.

Water intrusion into the cabin.

It is also a very common cause of fogging of glasses.

Cabin water constantly evaporates and increases the humidity in the cabin.

With such a malfunction, you will definitely easily find what is getting wet, but it’s not a fact that you can easily and quickly find the cause of water ingress.

As a rule, with such a malfunction, the windshield and the top of the front side windows do not fog up, and the rear (without heating) and side windows are covered with rather large drops of water.

Repair is carried out simply - we are looking for where the water enters the cabin, we eliminate it, we dry it.

Antifreeze is much more dangerous than water. It's bad for health!

The ingress of antifreeze into the cabin is manifested in the same way as the ingress of water, but there is a fundamental difference - the windows fog up more strongly, incl. and frontal.

You can distinguish water from antifreeze by a sweetish taste in your mouth and a damp passenger floor.

Repair is simple - we look for a leak (radiator, taps or pipes) and replace the damaged parts.

Here's an example of a saloon heater radiator getting wet, because of which my car was fogging up and the windows froze.

Misted windows in the car create a lot of inconvenience for the driver while driving. Car windows often fog up in winter or when it rains. Often due to impaired vision associated with misted glass, traffic accidents occur.

The cause of misted windows is always condensation formed from the temperature difference in the car and on the street.

If there is high humidity in the car interior from wet clothes and or rugs, then when the heater is turned on, the moisture begins to evaporate and settle on the windows. It is also possible that the cabin filter does not perform its function well, passing and not retaining moisture. There is a valve in the car for supplying clean air to the passenger compartment; if the sensor fails, this valve also fogs up the windows.

If there are drunk passengers in the car, this is also possible. Alcohol exhaled through the lungs settles on the glass and condenses water.

How to prevent windows from sweating?

In the cold season, the problem with misted glass is especially acute. This problem can be solved at the stage of buying a car. You should choose a model with a function windshield heating. Such a step will allow you to save not only time but also nerves when warming up the car.

If the car does not have such a function, then it is worth turning on the heater along with interior ventilation.

Such a tricky trick will quickly save the glass from condensation. It is better to turn on the air intake from the street, and not drive it only around the cabin. It is also worth monitoring the condition of the stove heater, this will allow you to quickly warm up the air in the car.

Even in the free sale there are special films from condensate. You can stick them in the same way as sunscreen films.

There are also chemical agents in the application of which the glass remains clean and does not sweat. It is better to choose products that are applied in the form of a spray. They are easy to apply, and before use, you only need to degrease the glass.

Folk remedies for misted glasses.

If it is not possible to purchase special tools, but you don’t want to drive with misted windows, then you can use folk remedies.

• Shaving foam helps with condensation. It should be applied to glass, and then rubbed with a dry cloth.
• Salt in paper bags is also a good way to remove moisture from windows.
• You can cut a lemon and rub the glass with its juice, then wipe it with a cloth.

What to do with sweaty glasses in the rain?

In rainy weather, the windows sweat due to temperature differences and excess moisture accumulated in the car. To avoid this, you need to carefully monitor the condition of the cabin filter. And if it is clogged, you should change it.

If moisture accumulates on the rugs, they must be dried and wiped.

Do not leave wet clothes and things in the car. When driving, if the windows sweat, you can open them a little, this will allow moist air to evaporate from the passenger compartment.

The key to clean and dry windows is good interior ventilation, with a constant supply of fresh air and an outflow of moist air. After the end of the trip, you need to open the windows and equalize the external and internal air temperatures, this will prevent condensation from forming.

Summing up, we can say that in order to avoid misted windows, you need to keep the car clean and service its heating and ventilation system in a timely manner.

With the onset of cold weather, many motorists have to deal with such a phenomenon as fogging car windows. This phenomenon is not only unpleasant from the point of view of comfort, but also represents a great danger to drivers in the form of limited visibility. In addition, drivers constantly have to be distracted by wiping the misted windows, which is strictly forbidden to do while driving.

Increased humidity in the cabin, which is the main reason why fogging of glasses, is also fraught with corrosion and the appearance of unpleasant odors due to the formation of mold, fungi and harmful bacteria, for which a humid environment is an ideal breeding ground.

Today I will try to figure out and understand why windows sweat and how to avoid fogging car windows.

First of all, I propose to talk about the reason why the windows in the car sweat.

The main reason why windows fog up is condensation, in other words, moisture that settles in the form of tiny water particles in the coldest places in the cabin, which, as you know, are car windows. Moisture is formed as a result of a person's hot breath, therefore, the more passengers there are in the cabin, the higher the humidity will be in it, and the stronger the fogging of the windows will be.

In addition to human exhalation, wet weather outside the window, as well as wet shoes or car mats, which absorb a large amount of moisture from shoes, can also be sources of moisture in the cabin. The source of moisture in a car is often a car stove that runs regularly during the cold season. Moisture enters through a stove hole designed for air intake, it is located in the upper part of the hood, near the plastic protection. Snow accumulating there during melting from a warm engine increases the level of humidity in the car.

About, why do windows sweat you already know, now I propose to talk about how to eliminate fogging of glasses, that is, about ways to deal with fogging windows in a car.

To get rid of fogging of glasses, you need to regularly care for the interior and follow simple rules, which we will talk about now.

The salon must be kept in constant cleanliness, this is especially important in rainy weather or in winter during a thaw. You should regularly ventilate the interior and make sure that the mats are not wet, dry them regularly. Tap or sweep your shoes before getting into the car, and in rainy times, try to keep your shoes dry (avoid getting wet, or change). Alternatively, you can choose which are easier to care for, and if moisture appears, it can be carefully poured out. The shape of the rubber mats does not allow moisture to go beyond the sides, so the moisture from the shoes does not go anywhere.

If you notice that snow has accumulated on the hood grate, do not be too lazy to shake it off, otherwise the snow in the form of moisture will enter the passenger compartment when the stove is turned on. From time to time, dry and ventilate the interior, to do this, turn on the air circulation in the cabin, regularly clean the car windows from frost. In winter, pour "anti-freeze" into the windshield washer reservoir, the liquid must contain alcohol, which prevents freezing.

When constantly foggy windows in the car, make it a rule before driving to properly ventilate and warm up the car interior. First, warm up all the windows, while not creating sudden temperature changes, if the windows in the car are frozen, warm them up gradually. Do not forget also about such important elements as: air conditioning, stove - all these elements must be serviceable and clean.

- an excellent solution to the issue of fogging windows in the cabin, it perfectly dries the air and keeps optimal temperature. If the car is not equipped with air conditioning, then fresh air or a stove will help to defeat the fogging of the windows, but it is better if they work in tandem. That is, with a working stove, turn on the air circulation from the street.

For proper operation of the blower, direct the flow regulators (deflectors) to the most misted areas and move the circulation lever to the leftmost position.

As an option, you can consider a method that allows you to partially "overcome" the fogging of glasses. It provides for a slight upgrade of the trunk air duct by cutting small holes in the trunk side trims. In the formed "windows" it is necessary to install plastic gratings (y), due to which the outflow of air will increase significantly. After such small upgrade, air ventilation in the cabin will be more efficient, after such a procedure there will be much less foggy windows in the car.

The next option is the use of anti-foggers, which do not allow moisture to collect and effectively fight against the formation of condensate. Anti-foggers are most often of two types:

1. In the form of a special liquid that covers the glass with a transparent film that does not allow moisture to accumulate on the windows.
2. In the form of a liquid that repels moisture.
3. Anti-foggers in the form of mastic. They are the most effective, but at the same time the most expensive among the above. The principle of their operation is based on similar principles - the glasses are covered with this composition and prevent the glasses from fogging and getting wet. What is important - one treatment is enough for several "wet" trips in wet weather.

Anti-foggers are applied exclusively to a dry, clean surface, but if you apply liquid to a fogged window, there will be no effect, and money will be wasted.

In winter, it is recommended to use "Anti-ice" and "Anti-freeze" products in the cabin, they help fight the accumulation of moisture on the windows and provide excellent visibility. These products contain alcohol, which prevents the formation of moisture and the accumulation of dirt, allowing you to keep the glass clean. The special composition allows you to forget about the fogging of glasses for a long time, as well as frost on the windows, even at -25 °. Special means work for at least 72 hours after application. the liquid does not affect the transparency of the glass and perfectly fights moisture.

That's all for today, I hope my article will help you solve the problem fogging windows in the car.

One of the main conditions for safe driving is good visibility. It is clear that the windows of the car, both side and wind, must always be clean. But what to do if the windows in the car fog up?

Why the windshield constantly sweats from the inside: the main reasons

The windows in the car fog up from the inside due to the fact that the temperature in the cabin exceeds the street temperature. As a result, the moisture contained in the cabin condenses on the windows. If the air humidity is high, then the windows completely cease to be transparent. That is why the windshield fogs up especially strongly from the inside in the rain (although this can happen in dry weather).

WATCH VIDEO

From the foregoing, it follows that in order to eliminate condensate in the passenger compartment, it is necessary to minimize the moisture content in the air. Its amount can be increased for several main reasons:

1. Water on rugs or wet shoes
2. A large number of passengers (a lot of water is released with breathing)
3. Wet saloon

Most often, the windows in the passenger compartment of the car are sweating precisely because of this. The recommendations in this case are simple: you need to monitor the shoes and cleanliness in the car, and also, in case of fogging, wipe the windows. In addition, before accepting passengers, you should warm up the car. However, there are other reasons why the windows in the car sweat.

Cabin air filter dirty

Misted glass may be a sign that it needs to be replaced. air filter. If it is dirty, moisture simply cannot leave the car. In addition, air pollution in the cabin is manifested, and when the ventilation is turned on, airflow is not felt. Experts recommend not to wait for such consequences, but to replace the element every 10,000-20,000 km.

Water ingress into the cabin

Moisture can enter the car not only through the doors, but also through the ventilation. Under the hood, all cars have drainage holes. If they become clogged, water will accumulate and enter the ventilation system. Because of this, the windshield sweats from the inside.

Wet soundproofing

The materials used for soundproofing in cars can absorb water well. This is especially often observed after trips through puddles or in rainy weather. To prevent the glass from sweating in the car, it is necessary to dry the material.

What to do if the glass sweats when the air conditioner is running

Quite often, motorists are faced with fogging windows during long-term operation of the air conditioner. In this case, moisture is already formed outside. In fact, this process is normal (again, a large temperature difference is at work). Therefore, there is no need to worry in this case.

How to remove condensate

After the appearance of condensate, many motorists immediately turn on the stove or open the window. These methods do work, but they may not be enough. If visibility does not improve, it is necessary to wipe the windows diagonally (this leaves less streaks) with a clean rag or napkin.

Chemistry from fogging

On sale you can find products that help get rid of the appearance of condensate. They can be in the form of a liquid or mastic, and are used both on the inside of the glass and on the outside. The anti-fog agent must be applied to a dry surface and rubbed. After that, a transparent film will appear on the window, repelling water. In winter, you can use anti-ice products.

You can also make your own glass defogger. To do this, you need to mix glycerin with alcohol, and then apply the mixture to the window.

Sweating glasses on prior, viburnum, vaz 2112 or 2110: what to do?

If the windows in the car are sweating, you can try turning on the stove. If condensation appears constantly, you should apply an anti-fog glass in the car. You may also need to replace the cabin filter (it is better to choose coal).

Fogging on Solaris, Mercedes w202 and Kia Rio

How to prevent fogging in the summer in the rain

WATCH VIDEO

Most often, the windshield fogs up from the inside in rainy weather. Therefore, it is advisable to take care of this problem in advance. Here's what you need to do.

• The state of the interior should be monitored. It must be dry.
• Before you put passengers, you need to warm up the car.
• You can use specialized means. The main thing is that the defogger be of high quality, otherwise stains on the glasses are inevitable.
• Car windows need to be cleaned periodically.
• If you have an air conditioner, before the trip, it is advisable to turn it on and direct the air flow to the glass.