If you live in a climate where rain is a common occurrence, you know that car windows can quickly become foggy. This is especially true when the temperature drops and moisture condenses on the inside of the window. There are a few things that you can do to help keep your windows from fogging up in the rain. First, make sure that your car has good ventilation. Open all of the windows and crank up the air conditioning as high as it will go. This will help to remove any moisture from the air and prevent it from condensing on your windows. Another thing that you can do is to use a de-icing spray on your windshield. This will help to prevent water droplets from forming and becoming trapped on the glass. Finally, make sure that you don’t leave any items inside of your car while it’s raining outside. This includes cups, food wrappers, etc. These items will all create moisture and fog up your windows quickly ..