What to Do When Car Windows Fog Up on Rainy Summer Days?
3 Answers
Wiping off the fog with a towel is the easiest and quickest method to remove fog, but you need to park the car first, as wiping the fog while driving can distract your attention. Using window ventilation to remove fog: Since window fogging is caused by the temperature difference between the inside and outside of the car, you can open a small gap in the window. Utilize the air conditioning's defogging function. Currently, most cars are equipped with a defogging feature; simply turn on the window defogging function. You can apply anti-fog spray in advance for prevention, especially in cities with significant day-night temperature differences or frequent rain and snow.
Having driven for so many years, fogging up in summer rain is all too common. The most effective method is to immediately turn on the AC cold air and direct it at the windshield, remembering to activate the AC dehumidification mode. If there are many people in the car exhaling humid air, switch from recirculation to fresh air mode, and the fog will clear up quickly. If the rain isn't heavy, crack the windows a bit for airflow, but be careful not to let rainwater drift in. Keeping a dry towel handy to wipe off external condensation is the most convenient—I once helped a colleague deal with sudden fogging on the highway this way.
Last time I encountered this situation while taking the kids out, here's how I handled it: First, I turned on the air conditioning to blow on the windshield at maximum fan speed for the quickest effect. I set the wipers to medium speed to constantly clear external condensation. If the humidity inside got too high, I cracked the windows slightly. After getting home, I immediately applied anti-fog treatment to the windshield, which remained effective for six months. Keeping an absorbent chamois cloth in the door pocket helps - when fogging occurs, wiping the exterior with it cleans better than wipers, even conveniently removing water droplets from side mirrors.
