What to Do When the Front Windshield Fogs Up on Rainy Days?
4 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.
When I first learned to drive, I used to panic when the windshield fogged up on rainy days. Now I know a bit more: just press the wiper button to clear the fog, and air conditioning control is crucial—find the windshield defrost mode and turn on the A/C for dehumidification, with the fan speed high but the temperature not too warm. I also keep a clean cloth in the car to quickly wipe the windshield at red lights, but never do it while driving to avoid distraction. A friend recommended anti-fog spray for convenience, but I found a mix of water and vinegar works fine to save money. The key is to act fast—don’t delay, as poor visibility in the rain can lead to accidents. With experience, you’ll stop panicking. Also, keeping the glass clean during regular car washes helps, as oily residue makes fogging worse. This small step makes a big difference.
As the regular driver in the family, I'm particularly concerned about safety when the windshield fogs up outside during rainy days. When it happens, I immediately turn on the wipers to clear it, while activating the air conditioning dehumidification function and setting the vents to blow cold air toward the front windshield. If the fog doesn't dissipate, I briefly stop to wipe it with a towel without wasting time. I educate my family: clear visibility is key, don't hesitate in the rain. For prevention, regularly clean the glass and use anti-fog products, and minimize opening windows to reduce humidity differences. Safety comes first, ensuring children in the back seat are also unaffected, and developing the habit of checking air conditioning settings as soon as the car starts.
