How to Remove Fog from Car’s Windshield – Tips to Defog Car during Winter Unlike summer fogging, downtime fogging occurs inside the vehicle. This is because the inside of the auto is generally warmer than the outside air. When the cold air and the warm glass match, condensation occurs on the inside of the auto and makes it a lot harder to get relieve of. For people in cold regions, this is a common problem, and then are some tricks you can use to defog your auto during the downtime. Recirculate the Air: Also known as the “Fresh Air Mode” button located on your dashboard, this is one of the easiest and quickest ways to defog your windshield in cold temperatures. The button has a auto with an arrow that points into the auto. Formerly turned on, this point pulls in fresh air from outdoors but doesn't lower the temperature inside the auto. Dwindling the Temperature inside the Car: As bandied before, the stylish way to stop fogging incontinently is to match the temperatures both outside and outdoors. During the summer, that might not be a huge problem, but in the downtime, that can be relatively daunting. Allowing cold air into your vehicle might not be a comfortable feeling so you can either drop the air- exertion temperature or increase the addict speed to lower the temperature outside. Once the temperature is reduced, the fogged-up glass windows and windshield should clear out.