How to Deal with Fogging Inside the Car on Rainy Days?
2 Answers
There are three solutions to deal with fogging inside the car on rainy days: 1. Air Conditioning Cooling: This method is suitable for summer rain. Turn on the front window defogging mode, set the fan speed to maximum, switch on the A/C, and adjust the temperature to the lowest. The fog on the glass will disappear shortly. Additionally, some car models are equipped with electric heating for the rear windshield and side mirrors. Simply press the switch, and the fog will clear in about a minute. 2. Air Conditioning Heating: If the car has just started, wait a few minutes for the engine to warm up and the water temperature to rise before turning on the heating. Set the air volume to maximum and activate the front window defogging mode. The fog will disappear within minutes. 3. Air Convection: This method is rarely suitable. Opening the windows can increase air convection, reduce the temperature difference inside and outside the car, and weaken the conditions for fog formation. While this seems economical, it is rarely practical. If it's raining outside, you can't keep the windows open, and the incoming airflow is quite limited.
When the car fogs up in the rain, the first thing I usually do is turn on the air conditioning to blow air onto the windows. Fogging occurs because the rain outside cools the car's exterior while the moisture from passengers' breathing inside creates a large temperature difference, causing water droplets to condense on the windows. Driving with fogged-up windows is dangerous as it can obstruct vision and lead to accidents, so it's best to pull over safely before addressing the issue. My approach is to first locate the defogging button on the central console (usually marked with a fan icon or an air direction symbol pointing toward the windshield) and turn on the cold air for effective dehumidification. If there's no button, manually adjust the air conditioning to direct airflow toward the windshield. Cracking a window slightly can also help ventilate the car quickly and reduce humidity. For minor fogging, gently wiping the glass with a clean, slightly damp cloth can work, but avoid using water as it may leave streaks and worsen the problem. Preventive measures include regularly cleaning the windows, placing bamboo charcoal bags inside the car to absorb moisture, and turning on the recirculation mode for a few minutes before driving on rainy days to dry the air. Avoid using warm air to defog, as it can worsen condensation in cold rainy weather unless it's an emergency. Regular maintenance of the air conditioning system ensures the fan works properly, preventing recurring issues. Above all, safety comes first—stay calm and follow the steps methodically if fogging occurs.
