Should You Use Cold or Hot Air to Defog Car Windows in Winter?
2 Answers
In winter, hot air should be used to defog car windows. When using hot air for defogging, adjust the temperature to a higher setting, increase the fan speed, and use the external air circulation to expel moisture from the vehicle. Methods to solve window fogging include: 1. Turn on the front window defogging mode, increase the fan speed, turn on the temperature control, and lower the temperature; 2. Activate the one-touch defogging function; 3. Open the windows to increase air circulation, reduce the temperature difference inside and outside the car, and weaken the conditions for fog formation; 4. Spray defogging agent evenly on the glass surface and wipe it clean with a dry towel; 5. Make a DIY defogging solution using dish soap and apply it before driving.
Just helped my mom with this headache a couple of days ago. While the warm air conditioning in winter is comfortable, blowing it directly onto the windshield actually makes the fog form faster because the moisture from your breath condenses on the cold glass. I usually just turn on the A/C button to cool—the air conditioning compressor can actually remove moisture from the car. Pair it with the defrost setting and blast the air at the windshield. It’ll feel a bit cold at first, but hold out for about ten seconds, and the fog will clear. Then you can turn off the A/C and switch back to warm air if you want. For foggy side mirrors, spraying some anti-fog solution in advance can keep them clear for three or four days. And remember—never wipe the windshield while driving, it’s dangerous!
