How to Deal with Fog on the Outside of the Windshield?
3 Answers
Methods to handle fog on the outside of the windshield: 1. Air conditioning defogging: Turn on the front window defogging mode, set the fan speed to maximum, turn on the A/C switch, and then adjust the temperature to the lowest. The fog on the glass will automatically disappear shortly. Additionally, some models have electric heating for the rear windshield and exterior rearview mirrors. Simply press the switch, and the fog will be eliminated in about a minute. 2. Air convection: Opening the windows can increase air convection, reduce the temperature difference between the inside and outside of the car, and weaken the conditions for fog formation. 3. Defogging agent: Just spray it evenly on the glass surface and wipe it clean with a dry towel. The principle is to use surfactants to leave a protective film on the glass surface, altering the surface tension of water molecules, causing fog droplets to coalesce into larger droplets, thus not obstructing the view.
It's always a bit annoying when the windshield fogs up on the outside while driving, especially on humid mornings or rainy days. This happens due to the large temperature difference between the cold exterior and warm interior, causing moisture to condense on the glass. Whenever this occurs, I immediately turn on the wipers for a quick swipe, which usually clears it up fast. If the wipers aren’t effective, I pull over and wipe the glass with a clean, soft cloth. Don’t forget to check the AC settings—switching to defrost mode and directing cold or warm air at the windshield can help reduce fogging. For daily prevention, regularly cleaning the glass and applying anti-fog spray works wonders. I always keep a bottle of spray in my car—it’s affordable but saves a lot of hassle. If fogging happens frequently, check if the wipers are worn and need replacement, or try to avoid parking in dewy areas when external humidity is high. In short, don’t panic—handle it step by step to ensure driving safety.
It's quite common to find condensation on the outside of the windshield while driving, especially during seasonal transitions. I immediately tried wiping it off with a quick swipe of the wipers. If that doesn’t work, it might be due to a dirty windshield or worn wiper blades. In such cases, simply pull over and wipe the glass surface—avoid multitasking while driving. Adjusting the car’s air conditioning is also crucial: turn up the fan speed and direct it toward the windshield, while slightly activating the external air circulation to improve airflow and reduce fogging. I’ve encountered this situation several times, particularly in summer after parking in the shade and restarting the car—the exterior glass fogs up quickly. Staying calm is key; regular cleaning of wipers and glass helps prevent this. Extra caution is needed on highways to avoid accidents caused by obscured vision. If fogging persists, check for potential moisture leaks or residual stains that need addressing.
