How to Remove Fog from the Outside of Car Windows on Rainy Summer Days?

[MacDakota]

Park the car, turn on the air conditioning, adjust the temperature control knob to the warm air direction, press the defrost button, and use warm air to dry the fog on the windshield. Before each use, spray evenly on the window and wipe it clean to form a transparent protective film on the glass to prevent fog formation. You can open a small gap in the windows on both sides to allow the air inside the car to circulate, gradually bringing the interior temperature closer to the outside temperature, which will help the fog dissipate.

[McFernando]

As a long-time driving enthusiast, I've had plenty of firsthand experience with foggy car windows during summer rainy days. Windshield fogging mainly occurs when the cold air from the car's AC meets warm, humid air, forming water droplets that dangerously obstruct visibility. My usual approach is to first run the wipers several times—they can quickly clear most of the condensation. Then, I turn on the AC in cool mode, directing the airflow toward the windows while remembering to activate recirculation mode to reduce humidity buildup. For stubborn fog, I use a commercial anti-fog spray—just wipe with a cloth for instant results, and preventive treatment can delay fog formation. Daily maintenance tips: Keep windshields clean to avoid oil buildup; replace wiper blades regularly to prevent aging-related streaking; check AC filters seasonally to ensure proper airflow. These steps make rainy-day driving safer and more hassle-free.

[DelJoanna]

It's common for car windows to fog up when driving in the summer rain, and as an experienced driver, I've encountered this many times. The fogging occurs when cold air inside the car meets the hot and humid glass, causing water droplets to condense. The key to handling it is speed and safety: first, use the wipers to quickly clear the fog; then turn on the AC, set the temperature low and increase the fan speed, directing the airflow toward the windows to dehumidify; if the rain is too heavy to stop, activate the car's built-in defogging function, which is usually just a button press away on most vehicles. I recommend using anti-fog spray or a mixture of household detergent and water applied with a cloth to wipe the windows, which can provide protection for several hours. For prevention, wipe the windows clean of oil stains before parking; avoid setting the AC too strong to prevent excessive cooling inside, which can accelerate fogging due to temperature differences. These tips are based on experience and simple actions to ensure clear visibility.

[DaisyLee]

Foggy windows on rainy summer days are annoying. I immediately turn on the wipers to clear the water droplets; then I turn on the air conditioner with cold air blowing directly at the windows to reduce fog using the dehumidification function. If that doesn’t work, I spray some defogger and wipe it off. This helps restore clear visibility for safe driving. Regular window cleaning is also important.