What to Do When Windows Fog Up?
3 Answers
When the temperature difference between the inside and outside of the car is not significant, you can open the windows to increase air convection and reduce fogging on the windows. However, this is not recommended when the temperature is too low. In extremely cold conditions, you can turn on the air conditioning and direct the vents toward the windows to raise the interior temperature and evaporate the fog. Inside the car, there are two buttons: the front window defogger button and the rear window defogger button. You can press both simultaneously and increase the fan speed to disperse the fog inside the car. Before each drive, evenly spray and wipe the windows clean to form a transparent protective film on the glass, preventing fog from forming.
Foggy windows while driving can be a real headache. Having driven for over a decade, I've encountered this issue many times—it's usually caused by significant temperature differences between inside and outside the car or high humidity. The simplest solution is to turn on the air conditioning defogger function—look for a button with an airflow icon, set it to blow air onto the windshield, and crank up the fan speed. Cold air quickly absorbs moisture, while warm air evaporates the fog; just choose based on the weather. Remember not to keep recirculating the interior air—switching to fresh air intake works better. For prevention, regularly clean oil film and dirt from the windshield, and choose breathable window tinting. If fogging occurs, stay calm and find a safe spot to pull over rather than trying to fix it while driving—safety comes first. These methods have proven reliable time and again, saving me on numerous occasions.
What worries me most about fogged-up windows is driving safety, especially when shuttling kids to school—blurred vision is terrifying. My routine is to immediately activate the defogging mode: right after starting the car, I press the AC's snowflake and airflow buttons, crank up the fan speed, and direct the airflow at the windshield. If it's slow to work, cracking a window slightly to ventilate helps reduce cabin humidity. In cold weather, warm air heats the glass more effectively, while cool air suffices in summer. Long-term, I regularly check if the cabin air filter is clogged—a dirty filter hampers defogging efficiency. Never hastily wipe the glass when fogged up; it's risky. Pull over if needed. Cultivating these habits makes driving safer, particularly in rainy or foggy conditions.
