What to Do When the Front Windshield Fogs Up on Rainy Days?
2 Answers
When the front windshield fogs up on rainy days, here are some defogging methods: 1. Turn on the defroster in the car: Activate the defroster while pressing the compressor (A/C) button. This will lower the temperature inside the car, which might feel cold in autumn and winter, but the defogging effect is significant. 2. Turn on the warm air from the air conditioner: Increase the airflow slightly. The dry, warm air will evaporate the water molecules inside the car, preventing fogging on the windshield. 3. Purchase dry anti-fog wipes: Before use, wipe the windshield with a damp cloth or apply the wipe directly when fog appears. The effect can last up to 24 hours. 4. Purchase wet anti-fog wipes: Wipe the fogged area directly, and the effect can last up to 24 hours. 5. Purchase anti-fog spray: Spray the glass anti-fog agent directly onto the front windshield. The anti-fog effect generally lasts about 10 days, with high-quality products lasting up to a month, far outperforming anti-fog wipes.
With thirty years of driving experience, I've encountered the issue of fogging on the outside of the windshield on rainy days quite often. It's usually caused by condensation due to significant temperature differences. The most straightforward solution is to activate the windshield wipers for a quick sweep. If the fog persists, turn on the air conditioning in dehumidification mode, direct the vents toward the windshield, and set a higher fan speed with lower temperature for better effectiveness. When parked, you can use a dry towel to wipe the glass gently to avoid scratches. For prevention, regularly clean the windows and apply anti-fog spray. Before it rains, adjust the interior temperature to a balanced level to minimize condensation. I've also found that using less warm air not only saves money but also clears fog faster. Maintaining clear visibility while driving in the rain is fundamental for safety. Developing this habit can prevent many accidents—don’t wait until the fogging becomes severe; address it promptly as soon as it appears.
