How to Deal with Foggy Windshield on Rainy Summer Days?
3 Answers
Here are the solutions for dealing with a foggy windshield on rainy summer days: 1. Lower the windows: Roll down the windows slightly to create a gap, reducing the temperature difference between the inside and outside of the car, which will make the fog disappear. In summer, fog forms on the outside of the windshield. The temperature inside the car is lower, while the outside temperature is higher. When the hot outside air meets the cold glass, the water vapor in the outside air condenses into tiny droplets on the cold glass. 2. Turn on the air conditioning: After turning on the air conditioning, use the recirculation mode and adjust the air vents to blow towards the windshield, which will quickly clear the fog inside the car. 3. Turn on the heater: Adjust the switch to the heating position, increase the fan speed, and also set the air vents to blow towards the windshield. This will raise the temperature inside the car and dry the air.
What bothers me most when driving in summer rain is the fogging up of the windshield. That haze blocking my view really makes me nervous. My usual solution is to immediately turn on the AC, set it to cold air mode and maximum fan speed, because the cold air can quickly absorb the moisture inside the car; don’t forget to press the external circulation button to let dry air in and dissipate the fog faster. If the fog persists, I use a clean microfiber cloth to gently wipe the glass, which won’t leave scratches. Safety-wise, fogging can easily lead to rear-end collisions, so I make it a habit to check the humidity inside the car in advance or use an anti-fog spray on the glass once a month as a preventive measure. When driving in the rain, it’s also important to pay attention to tire grip, ensure slower speeds, and maintain a safe following distance—these small habits add up to make the trip safer.
When encountering foggy windshields during summer rains, my first instinct is to activate the air conditioning's dehumidification function—simply press the fan blade icon button, and the system automatically adjusts fan speed and temperature to combat fog. As a tech enthusiast, I've discovered that modern car infotainment screens can set an automatic defogging mode, which is a lifesaver; it even intelligently syncs with GPS to predict weather changes during high humidity. Don’t forget to clean oily films off the glass—dirty surfaces fog up more easily. I use glass cleaner weekly to maintain clarity. Safety-wise, fog impairs turning judgment, so I recommend cracking windows slightly to aid airflow. Never dismiss it as a hassle—safety comes first.
