Which Air Setting to Use for Defogging the Windshield?

[LeCatherine]

Using the cold air setting is more effective because when the outside temperature is higher or lower than the inside temperature, condensation forms on the glass. You can also avoid using the air conditioner by opening the windows, which will make the fog disappear as well. Hot air can also dry the fog, but it is not as effective as cold air. Here are the correct methods to remove fog from the windshield: 1. Using the air conditioner's cold air to defog: The most effective way to remove fog from the windshield is to turn on the air conditioner (A/C) in cooling mode, activate the external circulation, and direct the airflow toward the windshield at maximum speed. The dry cold air will blow directly onto the windshield, creating a 'film of air' that prevents water vapor from condensing on the glass. The fog will disappear in less than a minute. 2. Using warm air to defog: The method is the same as using cold air, but instead of cold air, direct warm air toward the glass. This essentially dries the water vapor, eliminating concerns about fog reappearing. However, warm air defogging is slower than cold air, and the fog may initially worsen when first turned on, requiring a few minutes of patience.