Why Does Car Glass Frost Up in Winter?
2 Answers
It is due to the temperature difference between the inside and outside of the car. Because the temperature inside the cabin is higher than outside, the moisture in the cabin condenses on the inner windshield, forming frost. When the moisture in the warm air approaches the cold glass, it cools down and condenses into frost on the glass. Here are some solutions: 1. Defogging function: You can use the car's air conditioning defogging function to remove it. 2. Using the air conditioner: In this case, it is recommended to turn on the air conditioner first, use the cold air for a while, and then switch to warm air after the fog dissipates. Adjust the air conditioner to blow directly at the windshield, so the warm air can evaporate the fog. Alternatively, wiping the inside of the windshield with a cloth dipped in detergent or a special anti-fog agent can also effectively prevent fogging. While driving, you can slightly open the window to prevent fogging.
Window frosting is quite common, especially on cold winter mornings when there's a significant temperature difference between the inside and outside of the car. Simply put, the residual warm air inside your car carries moisture, which quickly condenses into frost when it comes into contact with the cold glass surface. This mainly happens because the humidity inside the car is too high after parking, such as forgetting to close the windows the night before or during rainy days when moisture can't dissipate. The greater the temperature difference, the faster the frost forms. Solving it isn't difficult: start the engine a few minutes before getting in the car and turn on the heater aimed at the windshield; develop good habits like leaving a small gap for ventilation when parking or placing a dehumidifying bag to absorb moisture. Older cars need extra attention to aging seals, and timely replacement can significantly reduce the chance of frosting. In extremely cold areas, using professional defrosting spray or applying a thermal insulation film can also be very effective. Remember, keeping the interior dry is key—don't skip this step, as driving with blurred vision is too dangerous.
