What Causes Frost to Form on Car Windows?

1 Answers
McAlejandro
07/30/25 8:00am
The reason for frost forming on car windows is: After people leave the car, residual heat remains inside the vehicle, causing the temperature of the windows to be higher than the outside. If the external temperature is too low, when the interior temperature gradually drops to match the outside temperature, the moisture on the windows begins to freeze. Once ice forms, any additional water that lands on it will not melt, causing the moisture on the interior windows to solidify into ice beads and form frost on the glass. Method to remove frost from windows: When parking after use, do not immediately lock the car and leave. Instead, wait patiently for a while, open both side doors for ventilation, and when the interior temperature drops to nearly match the outside temperature, turn on the power and use the windshield wipers to clear any remaining water from the front windshield before leaving.
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