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Should You Use Cold or Hot Air to Defog the Car?

1 Answers
MakaylaMarie
08/31/25 4:01am
Both cold air and hot air can be used to defog the car interior, with the only difference being the speed of defogging. You can choose based on your specific situation. Here are the detailed explanations: 1. Cold air defogs faster and is relatively safer, while hot air takes longer to defog but keeps the windows fog-free for a much longer period after the warm air dries the moisture. 2. If you need to drive for an extended period, it's recommended to use hot air for defogging. Start with a higher temperature setting, and once the fog begins to dissipate, lower the temperature to around 21 degrees. Although using warm air might initially increase the fog slightly, the subsequent effect will be much better. For shorter drives, cold air can be used for defogging.
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