How to Deal with Frost on the Inside of Car Windows?
3 Answers
There are six solutions to deal with frost on the inside of car windows: 1. Open the window: Frost forms due to the temperature difference between the cold outside and warm inside. Opening the window allows air circulation between the inside and outside of the car, reducing frost formation. 2. Turn on the warm air conditioning: When the engine coolant reaches a certain temperature, turn on the warm air conditioning for the front windshield, directing the airflow towards it and enabling the external circulation. This reduces the temperature difference between the inside and outside of the windshield, effectively removing frost. 3. Wipe with a towel: In winter, if the car has been parked outside for a long time, the windows may become covered with frost. Use a clean towel to wipe and remove the frost. 4. Apply professional anti-frost spray: Professional anti-frost sprays can be directly applied to the windows, forming a transparent protective film that effectively prevents condensation. 5. Make a DIY anti-frost solution: Mix household dishwashing liquid with water in a 1:6 ratio, or shampoo or body wash with water in a 1:10 ratio. Use a soft cloth to apply the solution to the windows, then wipe it dry with a clean cloth after it dries. 6. Balance the temperature inside and outside before closing the windows: After parking, open the windows to allow the inside and outside temperatures to equalize before closing them, which will prevent frost from forming on the windows.
I've encountered frost forming on the inside of car windows many times before. The main reasons are high humidity inside the car combined with temperature changes, such as accumulated breath moisture or water brought in by wet shoes on rainy days. As soon as I notice fogging, I immediately start the car and turn on the defogging function of the air conditioning - selecting cold air mode works fastest, with the fan speed set to maximum and directed at the windshield. At the same time, I open the windows slightly for ventilation to expel the humid air. Prevention is also crucial: regularly clean the interior glass surfaces with detergent to reduce water droplet condensation; if wet items like umbrellas or floor mats are left in the car, dry them immediately to avoid increasing humidity. I also recommend periodically checking the air conditioning filter, as clogging can affect dehumidification efficiency. In winter, preheating the car for a few minutes before departure to reduce the temperature difference between inside and outside can significantly lower the chance of fogging. These tricks have helped me avoid a lot of trouble.
When the car windows fog up, I believe the quickest way to handle it is to immediately turn on the defrost mode of the air conditioning, set the fan speed to maximum, and direct the airflow toward the windshield. Excessive humidity inside the car can cause this issue, so opening the windows for a few seconds to vent out the excess moisture before closing them helps. I usually make sure to keep the cabin dry—avoid leaving wet items like clothes or trash inside, especially cleaning the floor mats during rainy days. If the cabin air filter is dirty, the dehumidification effect will be poor, so I recommend replacing it once a year. Simple tools like anti-fog sprays are also quite effective—just spray and it works, but make sure to let it dry before driving. These methods are simple and practical; just don’t overlook preventive measures.
