How to Defog the Car Interior on Rainy Days?
3 Answers
Methods to defog the car interior on rainy days: After starting the engine, turn on the air conditioning heater and set it to a higher value, then direct it toward the windshield to remove fog; evenly spray defogging agent on the glass. Foggy windows can obstruct the driver's view, making the road ahead appear blurry and affecting safe driving. The following are the reasons for car window fogging: 1. When humidity is high, the window temperature is lower than the dew point temperature. 2. When the temperature is too low, the surface moisture of the window becomes saturated, and the vapor pressure is lower than that of the surrounding environment. 3. There is a certain temperature difference between the two sides of the window. 4. The temperature difference between the inside and outside of the car is large. 5. The car floor mats are damp.
Fogging inside the car on rainy days is mainly caused by the temperature difference between the inside and outside of the car, where humid air condenses into water droplets on the cold glass. I usually turn on the air conditioning in dehumidification mode as soon as I get in the car, adjust the air direction to the windshield and side windows, and set the fan speed higher. First, use cold air to quickly remove moisture, then switch to warm air after a few minutes to thoroughly dry the moisture. If the car has a defogging button, simply press it to solve the problem. Develop a habit of keeping the windows clean and free of fingerprints and grease, and avoid bringing wet items like umbrellas into the car on rainy days. In case of severe fogging, use a dry cloth to gently wipe the inside of the glass after parking to avoid distractions while driving and ensure safety. Long-term preventive measures include regularly checking the air conditioning filter and seals to ensure good ventilation in the cabin.
Don't panic when your car fogs up on rainy days! My first move is to turn on the air conditioning in cooling mode, increase the fan speed, and direct the vents straight at the windshield. Use the external circulation to let fresh air in and absorb the humidity. If the fog is light, I wipe the corners of the glass by hand. Preheating the air conditioning system before starting the car helps defog faster. During the rainy season, water stains on the windows can easily cause fogging, so I make sure to clean the inside of the glass when washing my car weekly. Preventively using anti-fog spray or simply wiping with soapy water works well. Check the weather before heading out and open the windows in advance to ventilate and reduce moisture buildup. A safety tip: when fogging occurs, turn on the hazard lights and drive slowly—never use a towel to wipe the glass while driving.
