Why Does Frost Form on Car Windows?

[StDamian]

It is caused by the temperature difference between the inside and outside of the vehicle. Since the cabin temperature is higher than the outdoor temperature, moisture in the cabin condenses on the inner windshield, forming frost. When the moisture in the warm air comes close to the cold glass, it cools down and condenses into frost on the glass. Here are some solutions: 1. Defogging function: Use the car's air conditioning defogging feature to remove it. 2. Using the air conditioner: In this situation, it is recommended to turn on the air conditioner first—start with the cold air for a while until the fog dissipates, then switch to warm air. Adjust the air vents to blow directly onto the windshield so the warm air can evaporate the fog. Alternatively, wiping the inside of the windshield with a cloth dipped in dish soap or a specialized anti-fog agent can also effectively prevent fogging. While driving, slightly opening the windows can help prevent condensation.