What are the methods to prevent fogging on car windows?
2 Answers
There are several methods to prevent fogging on car windows: 1. Before driving, you can use a specialized car window anti-fog spray on the windshield. After wiping it clean, it will form a protective film on the glass to prevent fog condensation; 2. If the fog on the car windows is not too severe, you can slightly open both side windows to leave a small gap or open the sunroof. This allows air to circulate, reducing fog formation; 3. In rainy weather when opening windows is not suitable, you can turn on the car's heater in advance to prevent window fogging. It's important to note that the A/C button should be turned off when using the heater.
I've been driving for over twenty years, and foggy windows are a common occurrence. There are quite a few practical methods to prevent fogging: turn on the air conditioning in dehumidification mode, direct cold air at the windshield, and the fog will dissipate immediately; warm air works too, but you need to open the windows first to let out the hot air and avoid a large temperature difference. Always carry an anti-fog cloth or spray—the kind sold in supermarkets for a few dollars—just wipe and it’s super convenient. Keeping the glass clean is crucial; wipe the inside and outside surfaces at least once a week to prevent oil buildup that causes faster fogging. In environments with significant temperature differences, like winter mornings, warm up the engine for a few minutes before heading out and use the external air circulation to balance humidity. Another detail: avoid having people talk or exhale too much in the car, as moisture buildup easily leads to fogging. Driving safety comes first—when fog appears, immediately turn on the air conditioning to fix it without any unnecessary fuss.
