How to Defog the Car Interior on Rainy Days?
2 Answers
Methods to defog the car interior on rainy days: 1. For manual air conditioning, turn on the front window defogging mode, switch on the AC, then lower the temperature, and wait for a while until the fog on the glass disappears; 2. Some car models are equipped with rear window electric heating and external rearview mirrors, and the fog can be eliminated in about one minute by simply clicking the switch; 3. For automatic air conditioning, just press the one-touch defrost button, after which the air volume will automatically turn on, and the external circulation will be activated; 4. Use the heating system to defog. If the car has just started, do not turn on the air conditioner immediately. Wait for the engine to preheat for a few minutes until the water temperature rises, then start the heating, increase the air volume, and turn on the front window defogging mode. The fog will disappear in a few minutes.
As a seasoned driver with years of experience, foggy windows on rainy days are all too common. Here's how I usually handle it: Start the engine immediately after getting in the car, press the defog button (usually the maximum airflow setting for the windshield), then turn on the AC to dehumidify—this quickly clears the fog. Remember, cold air works best; warm air can sometimes add moisture and worsen the problem. If the effect is slow, I crack open a window slightly to improve air circulation. I also maintain the AC system regularly to prevent filter blockages that can cause fogging. This method is simple and efficient, ensuring clear visibility and safer driving in the rain—make it a habit before danger strikes. Decades of driving have turned this routine into second nature. Sharing it here to help new drivers avoid pitfalls.
