Should You Use Cold or Warm Air to Defog the Inside of a Car?

1 Answers
Correia
07/29/25 5:25pm
When fogging occurs inside the car, warm air should be used for defogging in winter, while cold air is suitable for summer. Regardless of the season, opening the car windows can quickly remove fog after it forms inside the vehicle. Methods for defogging a car: Open windows for air circulation. If the fog is not heavy, slightly open both side windows to allow air convection inside the car. As the interior temperature gradually matches the outside temperature, the fog will dissipate. Use specialized defogging products, such as defogging sprays or defogging towels. Apply these defogging sprays to the inner surface of the car windows and wipe them clean. In addition to removing dirt from the glass, they form a thin transparent protective film that prevents moisture from condensing on the glass and forming fog. One application can prevent fogging for about ten days to half a month.
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