What to Do When There's Fog Inside the Car on Rainy Days?
4 Answers
The solutions for fog inside the car on rainy days are: 1. Car defogger: There are specialized defoggers for cars to address fogging. You can evenly spray the defogger on the surface of the car glass and then wipe it clean to remove the fog. Its principle is to form a transparent protective film on the glass to prevent water vapor from condensing on its surface. 2. Turn on the car's air circulation system: With technological advancements, most vehicles nowadays are equipped with an air circulation system. This system can help ventilate the air inside the car. If fog forms inside the car, you can eliminate it by turning on the air circulation system. However, it also has a drawback: keeping the air circulation system on for a long time will gradually reduce the warmth inside the car.
I've been driving for many years and often encounter fogging inside the car on rainy days. That hazy feeling is particularly annoying. When I get in the car, I first turn on the air conditioning to the defogging mode, directing cold or hot air toward the windshield—cold air works faster. At the same time, I crack open the windows slightly to ventilate and reduce humidity; remember not to use the recirculation mode, as it can increase moisture. If the fogging is still heavy, I pull over and use a soft cloth to clean the glass—wiping while driving is too dangerous. Regularly, I clean the interior of the windows to reduce dirt that traps moisture, and I keep some anti-fog spray on hand for emergencies. Safety first—extra caution is needed for visibility when driving in the rain.
As someone who loves researching car tips, I find the most effective way to defog on rainy days is to utilize the vehicle's functions—like directly pressing the defog button to activate the automatic system, where the AC can instantly clear the fog. The key is to use the external air circulation to bring in fresh air; avoid using internal circulation too much as it can increase humidity. Don’t forget to clean the AC filter, as a clogged one can reduce dehumidification effectiveness. I also like using anti-fog cloths or sprays to pre-treat the glass, which can temporarily prevent fogging for several hours. The principle is that large temperature differences cause fogging, so maintaining stable humidity inside the car is essential. These quick and safe tricks help reduce driving hassles.
As a daily commuter, foggy windows on rainy days make me quite nervous, afraid of not seeing the road clearly. I immediately turn on the air conditioning defogging mode when getting in the car, adjusting the airflow direction towards the windshield. If the rain outside is light, I crack the window slightly for ventilation; if it's heavy, I rely solely on the air conditioning. Sometimes I use a clean cloth to wipe away the fog, but only when parked safely to avoid distractions while driving. Prevention is simple: regularly clean the windows to remove dust and moisture, and keep the air conditioning on external circulation to let dry air into the car. Safety is the priority—never take risks over minor issues to ensure the car moves forward steadily.
