How to Remove Fog from the Windshield?
3 Answers
Methods to defog car windshields are as follows: 1. Open the windows; 2. Use a defogging agent; 3. Turn on the air conditioning heating; 4. Activate the car's defogging function; 5. Apply a mixture of dish soap and water or soapy water to the windows; 6. Place a dehumidifying box inside the car; 7. Wipe with a towel; 8. Adjust the fan speed appropriately and turn on the cooling switch. The reason for windshield fogging is: the temperature difference between the inside and outside of the car causes the water vapor inside the cabin to condense on the inner windshield, forming fog. Methods to prevent windshield fogging are: 1. Use specialized defogging products before driving; 2. Utilize the air conditioning's cooling and dehumidifying function to reduce air humidity.
Every time I drive my kids to school, the windshield fogs up on rainy or cold days, making me nervous. To solve this problem, I now have a well-established method: start the engine immediately after getting in the car, first adjust the air conditioning temperature higher (use heating in winter and cooling in summer), then press the defrost button—every car has this feature, which quickly directs the airflow to the windshield to remove fog. If the fog is heavy, I slightly open a window to ventilate and let the moisture escape. I also regularly wipe the inside of the glass with a microfiber cloth dipped in white vinegar to prevent fingerprints and grease buildup, which can cause fog to form faster. Additionally, I check if the cabin air filter is dirty—regular replacement ensures better airflow. After adopting these habits, the fogging issue has reduced significantly, making driving safer and more reassuring. Prevention is always better than dealing with problems on the spot, so I recommend everyone try anti-fog products in advance to avoid dangerous situations.
As a veteran driver with decades of experience, I've encountered windshield fogging countless times. The key is understanding the cause: temperature differences cause moisture to condense on the glass, so defogging should begin promptly. The first thing I do after starting the car is turn on the engine and adjust the AC (using warm air in cold weather and cool air in hot weather), then press the defog mode button—the system automatically controls airflow to clear the fog. If there's no dedicated button, manually adjusting the vents to blow upward toward the glass works too. Remember to use the external circulation mode to introduce dry outside air and aid dehumidification; opening the windows slightly helps even more when fogging is severe. For prevention, I keep the interior dry by avoiding wet shoes on rainy days or hot drinks that increase humidity. I also use specialized glass cleaner monthly to remove oil film residue effectively. Following these practices long-term not only speeds up defogging but also reduces sudden hazards. Developing these habits is what truly matters.
