How to Deal with Fogging on the Outside of the Windshield When Using Car Air Conditioning?
2 Answers
Enable the front windshield defrosting function and the rear windshield heating function. If fogging occurs on the side windows, slightly opening the windows can quickly remove the fog. Then, set the fan speed to maximum, turn on the A/C switch, and adjust the temperature to the lowest setting. The fog on the windshield will disappear shortly. Increasing air convection can reduce the temperature difference between the inside and outside of the car, thereby weakening the conditions for fog formation. When using, simply spray it evenly on the glass surface and wipe it clean with a dry towel.
Oh, I often encounter this issue while driving, especially in summer when the outside of the rear windshield fogs up after turning on the AC, making visibility blurry and quite dangerous. The reason is actually quite simple—it's due to low external temperatures or high humidity. The AC cools the glass surface too much, causing moisture in the air to condense on it. My approach is to stay calm and adjust the AC settings: avoid blowing cold air directly onto the glass, redirect it elsewhere inside the car, or slightly increase the temperature to prevent the glass from getting too cold. If that doesn’t work, I use the windshield wipers to quickly clear the fog, though this isn’t a long-term solution. I’ve also tried cracking the windows for ventilation to balance the temperature inside and outside the car, preventing fogging from recurring. For prevention, regularly cleaning the windshield helps, as a clean surface makes it harder for moisture to accumulate. Another tip is to preheat the AC for a while before driving. The key is to develop good habits—don’t wait until the problem gets serious to address it. Safety first! Sharing these little tricks—paying attention to them regularly can help avoid bigger troubles.
