What to Do When the Outside of the Windshield Fogs Up Before Turning on the AC?
2 Answers
The solutions for the outside of the windshield fogging up before turning on the AC are: 1. Open both windows slightly to allow air circulation; 2. Use the windshield heating wires to defog; 3. Purchase defogging products; 4. Visit a car detailing shop for cleaning. The reason the outside of the windshield fogs up before turning on the AC is the significant temperature difference between the inside and outside of the vehicle. The cabin temperature is higher than the outside, causing moisture in the cabin to condense on the inside of the windshield, forming fog. The maintenance methods for the windshield include: 1. Use specialized or suitable wiper blades and replace them promptly to avoid scratching the windshield; 2. Remove debris from the windshield; 3. Use automotive-specific glass cleaner.
Having driven for over a decade, I often encounter fogging on the outside of the windshield after turning on the AC, especially on rainy days—that kind of haze can seriously blur your vision. I’ve found the best solution is to immediately turn on the wipers; a gentle swipe usually clears it right up. If that doesn’t work, try raising the AC temperature to avoid blasting cold air directly onto the glass, or crack the window slightly to let some humidity escape. For maintenance, I recommend regularly cleaning the glass and applying anti-fog spray, which significantly reduces the chances of fogging. For safety, always check your wipers before driving. It might seem minor, but neglecting it can make the road dangerously hard to see, so making it a habit helps avoid trouble.
