What to Do When There Is Fog on the Outside of the Windshield?
2 Answers
Here are the methods to deal with fog on the outside of the windshield: 1. Use the car's built-in air conditioning system by turning on the fan and cooling switch. The cold air will disperse the fog on the windshield. 2. Open the windows to allow convection of hot and cold air. Crack open the side windows slightly to promote air circulation inside the car, bringing the interior temperature closer to the outside temperature, which will help the fog dissipate. 3. Use specialized anti-fog products. Spray them evenly on the windshield and wipe clean to form a transparent protective film that prevents fog formation. 4. Use dish soap with a dry cloth. Mix dish soap with water, apply evenly on the car glass with a sponge, and wipe clean with a car towel after it dries. This method leaves no watermarks and can effectively prevent fogging for up to 20 hours.
I know exactly what you mean about fogging up on the outside of the windshield, especially on rainy or foggy days—it's really annoying. My go-to solution is to turn on the wipers and give it a few swipes; most of the time, the fog clears right up. If the fog quickly builds up again, it’s probably because the AC vents are blasting cold air directly at the glass. In that case, I quickly shut off the front-facing vents and adjust the airflow to point at my feet or horizontally. Sometimes cracking the window a bit to balance the temperature inside and outside the car also helps. Just remember not to wipe it with your hand—it’s unsafe and leaves streaks. If all else fails, find a safe spot to pull over and let the glass adjust to the temperature, or check if the wiper blades are too worn to clear properly. Safety always comes first—when visibility is poor, slow down and drive cautiously.
