How to Defog your Car Windows, Learn how to defog your windows. I test home remedies that you guys told me to try out in my last car window defogging video. I test a bar of soap, mouthwash, spit, toothpaste, an avocado, and an onion. Which ones will work to prevent fog and which ones won’t, we shall find out?
Window fog builds because the air inside your car is moist. When temperatures drop, the air can’t hold the moisture and much of it is deposited on your windows.
Whether the fog is on the inside or the outside of your windows, any time you can’t see clearly in all directions, it’s dangerous.
So, it’s important to know how to make sure your windows are clear,no matter the weather.