How to Deal with Fog on the Outside of the Car's Windshield?
2 Answers
First, adjust the air vents to the front windshield, turn on the air conditioning cooling function, and use the external circulation with the maximum fan speed to remove the fog. Start with external circulation, select the hot air and front windshield vent, wait for about 5 minutes, then switch to internal circulation or simply turn it off.
I've been driving for decades, and this situation is very common, especially on rainy days or winter mornings. Fogging on the outside of the windshield mainly occurs because the temperature inside the car is higher than outside, causing moisture to condense into fog on the surface. Immediately turn on the air conditioning, set it to the windshield defrost mode, activate the dehumidification function, and switch to external circulation (avoid using internal circulation, as it increases humidity inside the car and worsens the fogging). At the same time, use the windshield wipers to clear the fog. If the wiper blades are dirty or have an oily film, clean or replace them first, otherwise they won’t clear the fog effectively. In winter, warming up the car for a few minutes before turning on the air conditioning is more effective. If visibility is poor, slow down and pull over to operate safely. Always prioritize safety, and regularly clean the windshield during car maintenance to prevent dirt buildup.
