How to Deal with Foggy Windows on Rainy Days in a Car?
2 Answers
When driving in the rain and encountering foggy windows, you can use the air conditioning system to defog. Turn on the front window defogging mode, set the fan speed to maximum, switch on the A/C, and adjust the temperature to the lowest setting. The fog on the windows will disappear shortly. Additionally, some car models come with heated rear windshields and side mirrors. Simply press the switch to activate the heating, and the fog will clear in about a minute. Here are some methods to prevent window fogging on rainy days: 1. Proper use of the air conditioning system: Park the car, start the air conditioning, adjust the temperature control to the warm air setting, and press the defogging button to dry the windshield with warm air. 2. Use specialized anti-fog products: Spray evenly on the windows and wipe clean before each use to form a transparent protective film that prevents fogging. 3. Open windows to allow air circulation: If the fog is not heavy, slightly open the side windows to let the inside and outside air mix, gradually equalizing the temperature and dispersing the fog. 4. Use dish soap with a dry cloth: Mix dish soap with water (ratio 1:6), apply evenly on the interior windows with a sponge, and wipe dry with a car towel once it dries, leaving no watermarks. This method usually keeps the windows fog-free for up to 20 hours.
Foggy car windows on rainy days are all too common. I usually turn on the air conditioning defog function immediately, adjusting the airflow direction to blow at the front windshield. Cold air can quickly absorb moisture, and modern cars are designed with this button. If the outside temperature is low, switching to warm air also works. Don’t forget to crack the window slightly to balance indoor and outdoor humidity—this trick is both cost-effective and efficient. When visibility is poor due to heavy fog, I slow down or pull over to handle it—safety first, don’t push through. Make it a habit to clean the inside of the glass regularly, minimizing fingerprints and grease. Using soapy water as a homemade defogger to spray and wipe can reduce fog buildup, making driving more reassuring. Also, try to park on dry ground in rainy weather, and shake off rainwater from clothes before getting in the car to avoid increasing interior humidity and fogging. These tips have helped me avoid many dangerous situations—the key is to react quickly without delay, as visibility while driving is a lifeline. In short, air conditioning plus ventilation is the most basic method—don’t overcomplicate it, and handle it with ease.
