What Causes Frost on the Exterior Windshield?

[StAngela]

Frost forming on the outside of the glass may occur when warm air from outside the vehicle meets the cold air inside, leading to frost formation on the glass. Here are some methods to defog car windows: 1. Apply Anti-Fog Spray: Spray a small amount of defogging agent onto the car windows and wipe it clean. This removes dirt and stains while forming a thin, transparent protective film on the glass, effectively preventing moisture from condensing into fog. 2. Use Air Conditioning Cooling: Utilize the air conditioning's dehumidifying function to reduce air humidity and remove fog. In summer, especially when many people enter the car without turning on the AC promptly, the high humidity from their breath can quickly cause the windshield to fog up. Turning on the AC and directing cool air toward the windshield can quickly remove the fog using the dehumidifying function.