How to Solve the Problem of Side Window Fogging?

[DelMaximus]

Turn on the air conditioning, set it to the hot air direction, switch to external circulation, and then press the defrost button. This allows outside air to enter the car, reducing the temperature difference. If the fogging is not severe, you can choose to slightly open the window to reduce the temperature difference between the inside and outside of the car. The fog will gradually disappear. Spray a small amount of defogging agent on the window, then wipe it clean. This not only cleans the window but also forms a protective film on it.

[TheoLynn]

I've been driving for over a decade and often encounter side window fogging issues, especially during rainy or cold weather when in a hurry. I remember one time on the highway when the fog was so thick I could barely see the road and nearly had an accident. I slammed on the brakes, quickly turned on the defroster mode, cranked the fan to maximum, aimed the airflow at the side windows, and activated the A/C to dehumidify—it cleared up in minutes. Normally, I pay attention to keeping the interior dry, like not bringing in wet umbrellas or leaking bottles, and using the fresh air mode to circulate air. Also, parking in shaded areas reduces temperature differences, and regularly replacing the cabin air filter helps minimize fogging. If it keeps happening, I'd recommend checking if the window seals are aged or leaking air and replacing them promptly—safety first.

[StMia]

To solve side window fogging, the key is to control humidity and temperature differences. A simple method is to turn on the A/C button for cooling and dehumidification as soon as you get in the car, increase the fan speed, and direct the airflow toward the glass. If fogging occurs rapidly, try opening a small window or the sunroof for a few seconds to reduce interior moisture buildup. For long-term prevention, check if the air conditioning system is functioning properly and ensure the filter isn’t clogged with dust, which could affect airflow. In winter, cold air is more effective for defogging, while warm air can worsen fogging. Keeping a dedicated defogging spray in the car is highly practical—just spray and it clears instantly. Developing good habits, such as checking window cleanliness before each trip, can also save trouble.

[BraydenMarie]

When I first started driving, foggy side windows always made me panic, not knowing what to do. Now I've learned better—whenever I see fog, I press that fan-shaped defrost button in the car, and the wind blows directly onto the glass, clearing it up in no time. I also turn on a bit of external air circulation to prevent the cabin from getting too stuffy. For emergencies, I've tried gently wiping the windows with a cloth. In summer when humidity is high, just lower the AC a bit; in winter, blowing hot air for a while works too. Avoid leaving wet clothes or spilled drinks in the car, as they can easily cause fogging. New drivers, don't worry—most cars have pretty straightforward setups.

[StVivienne]

Driving in fog is very dangerous, especially when carrying family and children. I always turn on the air conditioning's dehumidification function in advance, adjust the air direction to the side windows, set the fan speed to medium, and let the fog dissipate quickly. Use the external circulation mode to reduce internal humidity, such as clicking the external circulation icon on the air conditioning panel. For prevention, avoid parking by rivers or in humid and hot places, as parking in a garage is more stable. Regularly maintain the air conditioning filter to ensure clean airflow. Keep a small tool in the car for immediate use, such as a portable defogger. By taking care of these small things, driving becomes more reassuring.