How to Deal with Fog on the Outside of Car Windows on Rainy Days?
2 Answers
Here are the solutions to fogging on the windshield during rainy days: 1. Lower the window: Roll down the window slightly to create a gap, reducing the temperature difference between the inside and outside of the car, which will make the fog disappear. In summer, fog forms on the outside of the car glass. This happens because the interior of the car is cooler than the outside, and when the warm outside air meets the cold glass, the moisture in the air condenses into small water droplets. 2. Turn on the air conditioning: After turning on the air conditioning, use the recirculation mode and adjust the vents to blow air onto the glass, which will quickly clear the fog inside the car. 3. Turn on the heater: Adjust the switch to the heating position, increase the fan speed, and also set the vents to blow air onto the glass. This will raise the temperature inside the car and dry the air.
Fogging on the outside of car windows on rainy days is really annoying, mainly caused by external moisture condensing on cold glass. Having driven for decades, when encountering this situation, my first move is to swipe the wipers back and forth a few times to clear the surface fog. If it doesn't clean thoroughly, quickly turn on the car's air conditioning, switch to dehumidification mode, and direct the airflow toward the windshield. Drying the air can reduce more fog formation. Regular glass maintenance is also crucial—using specialized glass cleaner to wipe the windows during every car wash removes oil and dust to prevent fogging. Safety always comes first; if visibility is obstructed, pull over immediately to address the issue—never risk driving. These experiences have helped me avoid countless accidents, especially being extra vigilant on slippery rainy roads.
