How to Defog While Driving in Winter?
2 Answers
You can defog your car in winter by following these methods: If the vehicle speed is not very fast, you can use air convection: Open a small gap in the car window to allow air convection between the inside and outside of the car. After a while, the fog on the inner glass will dissipate. Use a car-specific anti-fog spray: Before applying the anti-fog spray, first clean the inside of the front windshield, then spray an appropriate amount of the anti-fog spray. After the spray solidifies, wipe it clean with a clean towel. The anti-fog spray forms a water-repellent layer between water molecules and the inner surface of the glass, keeping the glass surface clean and preventing fogging. Use the air conditioning's cooling and dehumidifying function to reduce air humidity and remove fog: In summer, especially when multiple people enter the car without turning on the air conditioning in time, the high humidity of exhaled air can quickly cause the front windshield to fog up. At this point, you can turn on the air conditioning to blow cold air toward the front windshield. Using the air conditioning's dehumidifying function, the fog on the front windshield can be removed quickly.
I've got plenty of experience with winter window fogging—it's mainly caused by the temperature difference between inside and outside the car plus high humidity. My routine is to turn on the AC for dehumidification as soon as I start the car, then switch to warm air directed at the windshield. Don't forget to press the external circulation button so fresh air can replace the humid air inside faster. If you're in a hurry, just roll down the windows for about ten seconds to speed up air convection—it works instantly. Keeping a dry towel handy to wipe the inside of the glass also helps. Once during a stretch of rainy days, I applied a thin layer of soapy water to the inside of the glass, and it kept fog away for three days! Now I make it a habit to check the AC filter every month since too much dust can reduce defogging efficiency.
