What to Do When There's Fog Inside the Car?

[DiLily]

Fog inside the car is caused by the temperature difference between the inside and outside of the vehicle. Simply opening the windows for ventilation can eliminate the fog. While driving, use a cloth to wipe off the frost on the windshield to maintain clear visibility.

[Victor]

Window fogging is particularly annoying in winter. As a seasoned driver with years of experience, I know the common cause is the temperature difference between the inside and outside, causing moisture inside the car to condense on the glass. The easiest solution in this situation is to use the air conditioning to defog: after starting the car, press the defog button or increase the fan speed, direct the vents toward the windshield—cold air works quickly but may feel chilly, while warm air takes a minute or two to take effect. Don’t forget to turn on the external circulation to let dry air in. If the fog is light, you can simply crack the windows for ventilation or use a defogging spray. Also, remember to clean the inside of the windows regularly, as dirt makes fogging more likely. Safety first—slow down when fogging occurs, especially during rain or at night. Keeping the interior dry and using absorbent mats can also help.