In the cold season, every driver is faced with the same problem - foggy car windows. Today we will try to understand the reasons for this phenomenon and answer the main questions - why does the glass sweat in the car and how can we fight it?
With the arrival of winter cold weather, fogged windows bring discomfort to the driver, and if you dig deeper, they can even cause emergency... Drops on the glass dramatically impair visibility, which distracts the driver from the road.
Why windows in a car sweat - the main reasons
To get rid of this misfortune, we recommend that you turn to the cause of the condensation. The question of why the windshield fogs up is not difficult to answer. Moisture from the air condenses on cold surfaces, and the longer a person is in the car, the more moisture gets into the air along with breathing.
Moisture will penetrate less into the car interior with a working heating system and windshield blowing
It is also possible that moisture appears due to a violation of the tightness of the seals on the glass. If you are not eager to drive in a "chronically" fogged car, you will have to deal with this drawback.
The most common way to fight is with a rag. But it only saves for a couple of minutes. No one will argue that this method is ineffective. The right path is taken by those who first dry the air a little in the cabin. For this, we recommend that you first ventilate the interior and warm up the car.
Next, you should turn on the stove and direct the air to the window, of course, if there is such an opportunity. You will achieve visible results if you put the stove outside on the air intake, and not in the circulation mode inside the car. If the car is equipped with air conditioning, then the problem disappears by itself - with it you can easily dry the air, saving the glass from the "foggy" effect in a matter of minutes.
If the car has a built-in electric glass heater, turn it on at the first sign of fogging
We found out why the glass fogs up, and in order to avoid this, you can take care of the condensation in advance. In order not to waste your nerves and time on warming up the cabin and its air conditioning, you just need to use a special compound called "anti-fogging".
Why do the windows sweat in the car and how to deal with it?
Craftsmen still rub glass with glycerin, after which they become greasy, and glare and streaks on the windows interfere with driving in the dark. By touching such glass, a person will get dirty. Why such hassle? Today, there are special products on sale that cover the glass with a transparent film and eliminate the problem of fogging. Moisture, of course, continues to accumulate on the windows, but thanks to the magic of the protective layer, water does not collect into drops!
To solve the problem of foggy windows, turn on the air conditioner - it's a great dehumidifier!
Why do the windows in the car fog up even after using special products? Sometimes it happens. To avoid this, it is worthwhile to competently familiarize yourself with the instructions for using an automobile anti-fogging agent. When the glass is already fogged up, it makes no sense to use such a remedy: chemistry is not a magician, it cannot remove the "fog" from the glass in any conditions. It should be applied to dry, clean glass, rubbing thoroughly with a cloth. This procedure will have to be carried out 2-3 times during the day.
Indeed, if your windows in your car are sweating, then this significantly affects visibility, you do not see complete information about the situation on the road, because the rear-view mirror is not available to you and side mirrors... Because of this, any maneuver carries with it danger and risk, since you may not notice a car moving in the oncoming or passing direction, or some signs. And also, constantly high humidity in the car negatively affects the interior itself. Therefore, it is advisable to use only different waysto prevent high humidity in the cabin, or rather fogging of the windows.
Why are the windows sweating in the car?
Glass fogging is a simple physical process, it occurs due to the fact that there is high humidity and warm air in the car, and it is cold or humid outside. Since there is no good air exchange in the car, temperature differences and high humidity are reflected in the windows. 
Here one cannot but mention another common reason for fogging windows - the presence of a passenger who has consumed alcohol, the fumes immediately affect the humidity of the windows in the cold season. But this problem can be called temporary, so we will not dwell on it.
What to do if the windows in the car are sweating?
As we said above, you need to find out the cause of the humidity. As a rule, it consists of poor ventilation. To do this, we advise you to examine air filter, probably a lot of dirt and dust has accumulated on it, so it just simply does not let air through. If you replaced the filter, or cleaned it, and the problem is still relevant, then you can solve it in another way. 
There are anti-fogging remedies. Thanks to them, the windows in your car will remain dry even in very high humidity. We advise you to choose funds renowned manufacturersalthough they are more expensive, the effect is much better. Be careful when applying the product, because it contains many chemical components. The way to use it is simple. To do this, wash the car windows well and apply an anti-fog agent, then rub well with a rag over the window surface. If the product can be applied to the glass from the outside, then do this procedure, and do not forget to treat the mirrors with it.
You can quickly get rid of moisture from the car windows by slightly opening the front windows, thanks to the air flow, fogging will disappear almost instantly. However, I don't really want to open the windows in cold weather, a blizzard or in heavy rain. You can solve this problem with an air conditioner by adjusting the air ducts on the windows. The windows will warm up quickly and the moisture will go away. For the rear window, you can use heating, if there is one. If not, then you can install it. We also recommend installing heated mirrors. It's pretty useful function, it will eliminate mirrors fogging and snow adhesion.
VIDEO - HOW TO FIGHT WITH SWEATED GLASS
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The problem of fogging glass in a car is familiar to all motorists, this usually occurs after rain, with high humidity. Nevertheless, with the onset of autumn and the first cold weather, the windows, as they say, simply flow. If you want to know why windows are leaking and how to get rid of it - read our article.
Is it worth fighting glass fogging in a car?
Many motorists do not even pay attention to the fact that their windows are fogged up, and some are trying in every possible way to solve this problem. Maybe you can really put up with it and continue to drive, not paying attention !? - No! It is necessary to solve the problem of fogging the windows in the car, since your safety and the condition of the interior in the car depend on it.Firstly, if your windows fog up in your car, then this affects the visibility of the road, more precisely, you will not own complete information about the traffic situation, as you will not be able to access the side mirrors and the rearview mirror. Because of this, every maneuver you make will carry the risk and danger that you will not notice the car moving in the same or opposite direction, as well as their signs. Secondly, constantly high humidity in the car negatively affects the interior elements. That is why it is best to use various methods to prevent increased humidity in the cabin and, in particular, fogging of the windows.
Why do car windows sweat?
Window fogging is a common physical process. Which occurs due to the fact that the car is warm, air and high humidity, and outside it is cool enough, or very humid. Due to the fact that there is no good air exchange in the car, high humidity and temperature differences are reflected on the glass.Here we cannot fail to mention another fairly common reason for the fogging of glasses - the presence of a passenger who has consumed alcohol, the fumes will immediately affect the humidity of the glasses in the cool season. But this problem is, let's say, temporary, so we won't dwell on it.
What to do if car windows sweat?
So, what to do if you are tired of the fogging problem in your car? As mentioned above, it is necessary to establish the cause of the high humidity. Most often it consists in poor ventilation of the vehicle interior. To do this, we recommend inspecting the cabin air filter, it is possible that a large amount of dust and dirt has accumulated on it, so it simply no longer lets air into the cabin from the outside. If you have changed the air filter, or it is clean, and the problem with fogging is relevant, then you can try to solve it in another way.
There are special anti-fogging agents. Thanks to them, the glass in your car will be dry even with very high humidity. We recommend giving preference to products from well-known manufacturers, although they are more expensive, the effect will be much better than from cheap ones. Be very careful when applying this product, as it contains a large amount of harmful chemical components. Its application is simple. To do this, you must thoroughly wash the glass of your car and apply this remedy from fogging on the glass, then rub thoroughly with a rag, over the entire glass surface with inside... If the product includes the possibility of applying it to the glass from the outside, then carry out this procedure, and do not forget to apply it to the side mirrors.
You can quickly remove moisture from the car windows by opening the front windows, thanks to the flow of fresh air, fogging will immediately go off the windows. But at the same time, they are not very willing to open their windows in heavy rain, snowstorm or in very cold weather. You can solve the problem with car air conditioner, directing the air ducts to the glass. The glass will quickly warm up, and the moisture will come off them. For rear window heating can be used, if available. It will also heat the glass, which will help the moisture to come off it.
If necessary, you can install a heater for the rear window of the car, if there is none. We also recommend installing heated side mirrors if not available. This is a very useful feature that will prevent the mirrors from fogging up when it rains or when snow sticks to them.
In general, it is quite easy to solve the problem with fogging of glass in a car, and there are many ways and means for this. By the way, speaking of autumn and winter - it is worth recalling the choice winter tires for your car, which we talked about in the last article.
Every motorist, no matter what car he drives, has come across such a seemingly insignificant problem, which is fogging of car windows. Contrary to popular opinion, the reason for this phenomenon is by no means used by the driver or passengers vehicle alcohol, although this factor contributes to an increase in the intensity of fogging.
The danger of this phenomenon lies in a significant deterioration in visibility, leading to a decrease in the control of the traffic situation by the driver of the car, that is, it directly affects the level of traffic safety. How to deal with fogging car glass?
To determine the optimal and effective methods to combat this phenomenon, it is necessary to understand the reasons for its occurrence.
The fogging process can be easily explained. It is based on the temperature difference inside and outside the vehicle and the increased humidity inside the passenger compartment. Automobile glasses, which serve as the boundary separating air masses of different temperatures, condense excess moisture on themselves.
Therefore, it is quite obvious that the only effective method of combating fogging of windshields (and not only) glass should be measures to minimize the humidity of the air in the car.
So why does the air mass inside the car have a high level of humidity? There are several main reasons for this:
Video - Sweat glass in a car - how to deal with it?
How to remove fogging in a car
Currently, there is a whole range of measures to help the car enthusiast fight this negative phenomenon that affects traffic safety. Moreover, this complex includes not only measures to directly eliminate fogging, but also measures of a preventive nature, helping to exclude the very possibility of the formation of wet fumes. So what to do?
- Regularly produce cleaning the inside of car windows from mandatory use quality detergents, and at the end of cleaning wipe them dry with a clean cloth. Also, try to avoid touching the glass surface with your hands.
- In a timely manner dry interior elements: floor mats, noise insulation, seat upholstery, etc.
- During replace cabin filter and cleaning the drain hole of the climate control.
- Regularly inspect possible places of leakage salon.
- Monitor the performance of the vehicle ventilation system.
Ways to eliminate fogging
In the event that the car windows are already fogged up (or icy), experts recommend:
- Warm up the car until the glass fogs up, while excluding people in the cabin.
- Turn on the ventilation system in a mode that ensures the flow of air masses from the outside, since the circulation of the air in the cabin is ineffective.
- If the vehicle is equipped with an air conditioning system, turn it on.
Chemical means of protecting glasses from fogging
Modern manufacturers offer car enthusiasts wide choose chemicals (liquid and aerosol) to prevent glass fogging. The principle of action of these drugs is based on the formation of a moisture-repellent film by them, which reduces the coefficient of surface tension of the glass, which prevents the formation and preservation of excess moisture on the surface of automobile glass.
The action of almost all modern means of protecting glass from fogging can be roughly divided into two stages. Initially, the drug acts as a glass cleaner, since it contains cleaning components, and then the cleaned car glass covered with a specific protective film.
However, in the process of choosing and using chemicals that prevent fogging of automobile windows, there are certain features, the so-called "pitfalls". Drugs low quality, of which, unfortunately, there are quite a few on the shelves of domestic auto shops, have a negative feature of leaving a non-drying greasy film on the surface of the auto glass. Traces from it stain the interior upholstery, and the stains and glare that appear on it can significantly complicate the driver's perception of the road situation.
Use of drugs high Quality does not threaten the car enthusiast with such complications, but their search will require some effort, and the acquisition of some costs.
As a summary, it must be stated that if your windshield is sweating from the inside, this is a serious problem and it must be solved by no less serious methods and by means of serious means. It was about them that was described above.
A clean windshield is one of the important factors safe driving... But even in summer, when several people are sitting in the cabin and the side windows are closed, when driving, a slight haze forms on the windows first, and then the windshield completely fogs up. And what can we say, when the weather is rainy outside, or already autumn slush, not to mention the snow slurry, caused to the cabin by the feet of passengers. Such a phenomenon is not at all a harmless joke, but a serious phenomenon, which in no case should be neglected. Under normal conditions, in summer or dry autumn, the misted windshield can be wiped from the inside with just your hand, or with a dry cloth, if one is at hand. After a constant temperature is established in the car, the fogged rear window will clear itself of moisture. But when it comes to driving in the winter, windshield fogging takes on a serious importance, which can lead to an accident, and on slippery road it is not always possible to do without injury or death.
Why do car windows fog up
On a note
In new cars equipped with a climate control system, a clogging of the condensate drain is occasionally noted, which leads to the fact that the air passing through the system picks up part of the water vapor and throws it into the passenger compartment.
There are several reasons why the windows in the car fog up, and it is difficult to single out the most serious of them - each option in itself carries certain inconveniences, and all together they pose a serious threat.
The windshield fogs up because the air humidity in the passenger compartment rises. After cleaning, especially wet, not everyone thoroughly blows moisture out of rugs, upholstery, noise insulation, seat covers, all cracks in the cabin. It is this moisture, plus the air that passengers exhale in the closed space of the cabin and form the moisture film that settles on colder surfaces, i.e. glasses. And in cars with a long service life, there will certainly be one or two microscopic holes in the cabin body, which is why it is so important to prepare for work in the autumn-winter period, when it is necessary to completely seal the cabin.
How to deal with fogging glass in a car
Because main reason the fact that the windshield fogs up is the temperature difference inside and outside the car, then the first step is to adjust the blowing devices so that the air from the deflectors is directed to the windows. If you have an air conditioner, you need to turn it on and it will quickly dry the air in the passenger compartment. In any case, when preparing for driving in autumn and winter, you need to check the cabin filter, and replace if necessary.
The car market offers many ways to eliminate windshield fogging. They differ in quality and, accordingly, in price. But they work according to the same principle - with their help, the parameter of the surface tension of the film on the windshield changes, so the microdroplets of moisture simply roll down without lingering on the surface of the glass. Call specific brands we do not undertake, as even the smells of different products can affect your choice.
The fogging problem is far from new, so a kind of set has formed folk remedieswith the help of which drivers eliminated this problem. Some advise using a bag of salt, which is periodically rubbed over the fogged windshield, others suggest diluting 1/10 of the glycerin in alcohol and rubbing the glass with it. The simplest method is ajar side glass, or a window, if there is one. The air flow from the passenger compartment will quickly draw out excess moisture, the only thing is some temperature discomfort.
Recently, they began to offer special films that are applied to the surface windshield, and it will be protected from fogging for a while.
On most modern serial cars, to combat fogging and freezing of glasses, a rear window heating built into the glass is used, and by special order, such heating is also installed on the front glass, which makes it possible to eliminate this phenomenon in just a few minutes.
But, in any case, moisture in the cabin needs to be fought. Timely dried carpets, damp rags that need to be removed from the passenger compartment, a bag of salt that can be placed under the rear seat will reduce moisture and help to reduce the possibility of windshield fogging and rear windows, and sometimes lateral.
And the last thing. Keep in mind that drunk people exhale alcohol vapors that draw moisture from everywhere and that it settles on glass surfaces, and traffic police officers get another reason to make claims to the driver, even if he did not drink anything stronger than coffee.
