How to Deal with Fogging on the Outside of Car Windows?
3 Answers
To address fogging on the outside of car windows, you can use the windshield wipers to wipe it away. If the fog is heavy and the wipers are not effective, you can also use warm air to blow onto the windshield. Adjust the directional switch to direct air toward the glass, and the fog will disappear shortly, with very noticeable results. Below are detailed explanations regarding fogging on the outside of car windows: Causes of fogging on the outside of car windows: Fogging occurs on the outside during rainy summer days because the external air humidity is high, but the temperature is not low. When humid air comes into contact with the cooler glass, water vapor condenses into tiny droplets, forming fog on the outside of the glass. The principle is similar to fogging on the inside of windows in winter, which happens due to high humidity inside the cabin meeting the cooler glass. Therefore, in summer, if the air conditioning is on, the windshield becomes cooler and more prone to fogging. Methods to remove fogging on the outside of car windows: Glass defogger: Simply spray it evenly on the glass surface and wipe it clean with a dry towel; Air conditioning defogging: For manual air conditioning, turn on the front window defogging mode, set the fan speed to maximum, turn on the AC switch, and adjust the temperature to the lowest. For automatic air conditioning, usually just press the one-touch defrost button, after which the fan speed automatically increases to maximum and the external circulation is activated; Homemade defogger: Mix dish soap and water in a 1:6 ratio, pour it into a spray bottle, spray it evenly on the glass surface, and wipe it clean with a dry towel.
Recently, I discovered the issue of window fogging and have figured out a few quick defogging tips myself. Before driving in rainy or foggy weather, it's best to turn on the air conditioning's defogging mode first, aim the vents at the windshield, set the temperature to the lowest, and turn the fan speed to the maximum. This way, the cold air can quickly disperse the fog. After the fog dissipates, switch to warm air to maintain a balanced glass temperature. Keeping an absorbent towel in the car for wiping is also very convenient, but remember that safety comes first while driving—wiping should only be done when the car is parked. I also learned a little trick online: wiping the inside of the glass with diluted dish soap can form a protective film to delay fogging.
As a seasoned long-distance driver, I've got some tricks up my sleeve for dealing with foggy windows. When driving in rainy conditions, I immediately press the front windshield defogger button after starting the engine, making sure to turn on the A/C switch along with the external circulation mode for optimal dehumidification. For foggy side mirrors and rear windshield, I use the rear window defogging function which heats them to clear up. Another tip: avoid leaving too many opened bottled waters or damp items inside the car, as they increase humidity and fogging. During rest stops at service areas, I leave slight window gaps to maintain air circulation - this makes the cabin less prone to fogging compared to keeping it completely sealed.
