How to Defog When Driving in Winter?
2 Answers
Here are some methods to defog when driving in winter: 1. If the speed is not too 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. 2. Use a car-specific anti-fog spray: Before using the anti-fog spray, first clean the inside of the 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. 3. 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 and the air conditioning is not turned on in time, the humidity from exhaled breath can quickly cause the windshield to fog up. In this case, turn on the air conditioning to blow cold air toward the windshield. Using the dehumidifying function of the air conditioning, the fog on the windshield can be removed quickly.
Driving in winter with fogged-up windows is quite annoying, especially when dropping kids off at school. I always let the car warm up for a few minutes before getting in to reduce the temperature difference. After starting the engine, I immediately turn on the defogging mode with the AC: set the fan to maximum, adjust the temperature to the hottest setting, and direct the airflow toward the windshield. Don’t forget to turn on the A/C switch—though it’s cold, it helps dehumidify. Sometimes I switch to external circulation to draw in dry, cold air, and if the humidity is too high, I crack the window slightly for ventilation. I always keep a microfiber cloth in the car to quickly wipe away fog when it appears. Last time during heavy snow, the fog was so thick I couldn’t see, so I pulled over to deal with it—safety first. Remember not to wipe the windshield manually while driving; it’s best to pull over. These habits make our family trips safer and help avoid potential dangers caused by poor visibility.
