During cold or humid months, car owners frequently deal with fog. This usually happens when the colder air hits the windows which is warm from heat inside. Or maybe you just got in your car after a nice day at the spa and condensation arises. Fog created this way can seriously impact your view of the road and you won’t be able to drive safely.

What causes car windows to fog?

Lowe temperatures cause lower relative humidity. Generally speaking, cool air has more reduced moisture compared for example a warmer interior environment. Let’s say that it’s raining heavily outside and you enter your car with a wet jacket. This way you are increasing the humidity of your car’s interior. And since the inside of your car is warmer, the excess moisture will start evaporating and sticking to your car windows.

What can do to defog my car windows?

There are four quite easy steps that you can take in order to quickly defog your car’s windows.

  1. Crank up the heat!

This should be the No 1 think you do when you get into your car. Turn on the heating to maximum! Because of the high heat level in your car, the moisture will be absorbed by the car interior.

  1. Turn on the AC

The second thing you can to od turn on the AC. Yes, you might think that turning on the AC will make things worse, but you’re wrong. The air conditioning will further reduce the amount of moisture in the car and thus defog the car windows.

  1. No air recirculation

In order to defog the car windows, you need cooler air from the outside which has less moisture than the air in your car. That’s why you should turn off air recirculation and let your car’s AC ‘exchange’ the interior highly-moisturized air with the outer moisture-deficient air. Turning off air recirculation is dead easy. You just have to press a button with a curved arrow in a vehicle sign. This is dramatically speed up the moisture elimination.

  1. Open side windows.

And lastly, make sure that you open your side windows, even by an inch or two. Thing might not be pleasant to your other passenger, but it won’t take long. With this trick, you’re basically letting in cooler air with less moisture in your car which ‘pushes’ out the warmer moisture-rich air out of the car. Very much like when you turn off air recirculation.

Can I avoid foggy car windows?

Avoiding foggy car windows is possible, and it’s not rocket science. The first think you should do is to properly prepare your car windows. Auto Glass specialists recommend using a higher-quality cleaner that has NO ammonia and a microfiber towel. Remember, microfiber cloths or fibers also prevent windshield stratches.

The second step is to remove any excess grease or oil works from your car windows. You can do this by using an alcohol-based surface cleaner. This will clean up the surface nicely and prepare it for the second stage.

The last step is to apply anti-fog product on the inner part of your windshield or car windows. Just spray it on the micro-suede applicator and that should do the job. After that, continue with whipping the windshield with this solution. You first start with vertical strokes and after that you do with horizontal strokes. The solution would take about 2-5 minutes to dry up. Wait it out and just polish it with a clean and dry microfiber cloth.

However, if you need help with this, we at Auto Glass Express can do this process for you. And if you need tips on windshield maintenance, make sure to reach out!