How to Remove Fog from the Windshield on Rainy Days
3 Answers
When the windshield fogs up on rainy days, the following methods can be used to remove the fog: 1. Turn on the defroster in the car: Activate the defroster while also pressing the A/C button to start the compressor. This will lower the temperature inside the car, which might feel cold in autumn and winter, but the defogging effect is noticeable. 2. Turn on the warm air from the air conditioner: Increase the fan speed. The dry, warm air will evaporate the moisture inside the car, preventing fog from forming on the windshield. 3. Purchase dry anti-fog wipes: Before use, wipe the windshield with a damp cloth or use the wipes directly when fog appears. The effect can last up to 24 hours. 4. Purchase wet anti-fog wipes: Wipe the fogged areas directly, and the effect can last up to 24 hours. 5. Purchase anti-fog spray: Spray the anti-fog spray directly onto the windshield. The effect typically lasts about 10 days, with high-quality sprays even lasting up to a month, far outperforming anti-fog wipes.
On rainy days, as soon as I get in the car, I turn on the air conditioning, press the A/C button to switch to dehumidification mode, and direct cold air at the windshield for a few seconds to clear it quickly. If the fog is still heavy, I turn on the external circulation to let fresh air in, reducing humidity buildup inside the car. Sometimes, cracking the window slightly can also help balance the temperature and remove fog faster. I usually keep an anti-fog cloth handy for a quick wipe—simple and cost-effective. Remember not to blast hot air, as it can worsen fogging or make the interior stuffy. Safety first: if fog builds up, pull over to deal with it instead of driving blindly. Checking that the air filter isn’t clogged can prevent issues. Make it a habit to adjust the settings when you get in the car—clear visibility in the rain makes for a more relaxed drive.
Windshield fogging poses a serious safety hazard as it severely obstructs visibility and increases accident risks. I promptly activate the air conditioning's dehumidification mode at maximum fan speed directed at the windshield, while switching to external air circulation to minimize temperature differences and reduce condensation. The rear window defroster remains frequently engaged as auxiliary support. Regular vehicle cleaning prevents dust accumulation that traps moisture, and applying anti-fog spray before rainy-day trips adds extra precaution. Maintaining a well-serviced AC system ensures proper ventilation and naturally reduces fogging. Remember to act immediately without delay – these measures safeguard your driving safety.
