How to Deal with Fogging on the Outside of the Car Windshield in Summer?

2 Answers
DeCaleb
07/24/25 1:04pm
Methods to handle fogging on the outside of the car windshield in summer: Use the air conditioning's cooling and dehumidifying function to reduce air humidity and remove fog. More information about fogging on the outside of the car windshield in summer is as follows: 1. Reasons for fogging on the outside of the car windshield in summer: High external air humidity and temperature cause moist air to condense into small water droplets when it meets the cooler glass, forming fog on the outside of the windshield. 2. Methods to prevent fogging on the outside of the car windshield in summer: Spray anti-fog agent. Apply a small amount of defogging agent to the car windows, wipe it clean, and it will remove dirt and stains from the glass while forming a thin transparent protective film, effectively preventing moisture from condensing into fog on the glass.
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LeVivian
08/11/25 7:09am
It's quite annoying when the windshield fogs up on the outside during summer driving, especially with the AC blasting cold air inside while it's scorching hot outside. Moisture condenses into a layer of fog on the glass. When this happens to me, I usually first swipe it away with the wipers a few times, making sure they're clean to avoid scratching the windshield. At the same time, I adjust the AC settings, either switching the vent mode to avoid direct airflow onto the glass or turning on a bit of external circulation to balance the temperature. Opening the windows for some fresh air also helps, though not for too long, especially on highways where it's unsafe. For prevention, I make it a habit to start the AC early without setting it too cold, or apply some anti-fog spray. This simple and practical method helps avoid driving distractions, and with consistent practice, fogging becomes much less frequent, making driving more comfortable and worry-free.
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