What are the methods to remove fog from the outside of car windows?

2 Answers
SanBlakely
07/24/25 5:50am
Fogging on car windows is commonly seen in weather conditions such as rainy days or temperature drops. It can be prevented by using air conditioning defogging, glass defogging agents, or homemade defogging solutions like mixing dish soap. To remove fog from the windows, here are three methods: 1. Use a glass defogging agent: Simply spray it evenly on the glass surface and wipe it clean with a dry towel. 2. Use a homemade defogging agent: Try making your own defogging solution, with the most widely used formula being a mixture of dish soap and water in a 1:6 ratio. After mixing, pour it into a spray bottle, spray it evenly on the glass surface, and wipe it clean with a dry towel. 3. Use air conditioning defogging: For manual air conditioning, turn on the front window defogging mode, set the fan speed to maximum, turn on the A/C switch, and adjust the temperature to the lowest. The fog on the windows will disappear shortly. For automatic air conditioning, usually just press the one-touch defrost button, and the fan will automatically turn to maximum speed while enabling the external circulation.
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VonFrancisco
08/11/25 1:30am
I find it quite annoying when the car windows fog up on the outside, which often happens during times of significant temperature differences, such as early mornings or after rain. I immediately turn on the wipers to wipe away the fog. If that doesn’t work well, I turn on the air conditioning and set it to the windshield defrost mode—both cold and warm air are effective, and the fog clears after a short while. Another trick is to buy an anti-fog spray, apply it evenly on the glass, and it can prevent fogging for several hours. When washing my car, I pay special attention to cleaning the windows thoroughly—less oil and dirt means less fogging. For safety, when the windows fog up, I avoid driving fast in a hurry; it’s safer to pull over and handle the issue. Combining these methods solves about 90% of the problem, making me feel much more at ease while driving.
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