Why Can't You See Clearly Through Car Windows When It Rains?

[Leonardo]

On rainy days, the temperature usually drops, making it easier for fog to form on the car windows. The reason for the fog is the temperature difference between the two sides of the window and the high humidity inside the car. Here are some solutions to prevent fogging on the front windshield during summer rain: 1. Lower the windows: Roll down the windows slightly to create a gap, reducing the temperature difference between the inside and outside of the car. This will make the fog disappear. In summer, fog forms on the outside of the glass because the temperature inside the car is lower than outside. When the hot outside air meets the cold glass, the water vapor in the outside air condenses into tiny droplets. 2. Turn on the air conditioning: After turning on the air conditioning, use the recirculation mode and adjust the vents to blow air onto the glass. This will quickly clear the fog inside the car. 3. Turn on the heater: Adjust the switch to the heating position, increase the fan speed, and set the vents to blow air onto the glass. This will raise the temperature inside the car and dry the air.