What to Do When the Car's Exterior Glass Fogs Up in the Rain?

[StevenLee]

When the car's exterior glass fogs up in the rain, you can use the windshield wipers to clean the glass or spray windshield washer fluid, which contains surfactants that can delay fogging. Upon noticing fog on the glass, first adjust the air conditioning vents to direct airflow toward the front windshield, turn on the air conditioning cooling function, and switch to external circulation with the highest fan speed. This can quickly clear the fog from the glass in just about ten seconds. When driving in the rain, turn on the windshield wipers and adjust their speed according to the intensity of the rain. Some cars have an automatic adjustment feature. If the weather is overcast with thick clouds and poor visibility, you should also turn on the driving lights.