What Causes Fogging on the Outside of Car Windows?
1 Answers
Fogging on the outside of car windows occurs due to the temperature difference between the inside and outside of the vehicle. When the temperature inside the cabin is lower than the outside temperature, moisture in the air condenses on the outer surface of the windshield, forming fog. This phenomenon is most common during winter. In summer, fogging typically only happens on rainy days because the external air humidity is high, but the temperature is not low. When humid air comes into contact with the cooler glass, the water vapor condenses into tiny droplets, resulting in fog. Methods to Remove Fog from Car Windows: Open Windows for Airflow: If the fog is not heavy, you can slightly open the side windows to allow air to circulate between the inside and outside of the car. This helps balance the temperature inside and outside, gradually dissipating the fog. Use the Air Conditioner: Adjust the fan speed appropriately and turn on the cooling function. The cold air blown onto the glass will quickly disperse the fog, providing a fast and direct solution. Alternatively, you can use the heater to defog, which doesn’t consume extra energy and ensures a comfortable driving experience. Apply Anti-Fog Spray: Spraying an anti-fog agent on the windshield or wiping it onto the glass with a towel is also effective. Typically, one application can prevent fogging for about half a month, making it a great solution for winter. Wipe the Windows with a Towel: Simply wiping away the condensed droplets with a towel can remove the fog. However, ensure the car is parked safely before doing so, as wiping while driving can pose safety risks.
