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How to Deal with Foggy Car Windows While Driving?

3 Answers
MacRylee
09/03/25 7:50am
Here are the methods to handle foggy car windows while driving: 1. Air Conditioning Defogging: The simplest method is to turn on the warm air conditioning and direct it towards the windows to reduce the temperature difference between the inside and outside of the glass, thereby removing the fog. However, there is a minor issue: the fog on the side and rear windows may not clear as quickly. 2. Air Convection: Open the side windows slightly to allow air convection, which helps blow away the moisture and reduces water condensation on the glass. In simpler terms, this method lowers the interior temperature to balance it with the outside temperature. However, foggy weather often comes with rain or snow, and opening the windows can make the interior too cold, increasing the risk of catching a cold. Therefore, this is not the best method.
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LeEverett
09/16/25 2:25am
Every time I encounter foggy windows while driving, I immediately press the defog button on the AC panel. That little fan icon blows cold or warm air toward the windshield, and the fog dissipates quickly. On cold and humid days, I like to crack the window slightly to let fresh air circulate in, which speeds up defogging. Remember not to wipe the glass with a towel—it's too distracting and dangerous, increasing the risk of accidents. I always keep a bottle of defogging spray in my car now. Spraying it on a cloth and giving the glass a quick wipe prevents fogging for several days—super practical. Safety first: drive slowly and steadily in foggy conditions, maintaining a safe distance. Regularly cleaning the AC filter also helps avoid moisture buildup and frequent fogging. These are all little tips I've picked up from daily driving.
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LeJaxon
10/30/25 3:00am
Dealing with foggy car windows when taking kids out is a major headache. I usually start by turning on the defogging mode of the car's air conditioning, directing warm air at the windshield at a moderate temperature to avoid discomfort for the children. Alternatively, slightly opening the rear windows for ventilation helps circulate air and clear the fog. For prevention, I make it a habit to place some desiccants inside the car to absorb excess moisture and prevent fogging. Safety-wise, it's crucial not to let rear passengers reach out to wipe the windows, and never get distracted by such operations yourself—keeping your eyes on the road is paramount. In foggy conditions with low visibility, slowing down ensures the safety of the whole family. Regularly checking the aging of window seals and replacing them in time can also minimize external moisture seepage that causes fogging issues.
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