How to Deal with Fogging When Using Air Conditioning in the Car?
2 Answers
First, use a clean towel or a car-specific anti-fog towel to wipe the fog off the glass. Spraying a professional defogging agent can also prevent window fogging. Spray a small amount of the defogging agent on the car glass and then wipe it clean.
I have long studied car air conditioning systems, and fogging usually occurs due to high humidity inside the car combined with a large temperature difference between the inside and outside. This happens when cold air from the AC blows onto the cold windshield, causing condensation. It's common when using the recirculation mode, as moisture can't escape. Immediate action involves turning on the defogging mode or switching to fresh air mode, increasing the fan speed, and ensuring the AC button is on for dehumidification. Blow cold air for a few minutes to balance the temperature before gradually transitioning to warm air. Remember to clean the windshield, as dirt makes fogging more likely. The compressor effectively reduces humidity, so don't rush to turn on the heater after starting the engine. Maintaining the AC filter and ducts also prevents fogging. These small tips help maintain clear visibility for safe driving.