What to Do When the Car Windshield Fogs Up?
2 Answers
Solutions for a foggy car windshield include: 1. Use a defogging agent to remove the fog by spraying it evenly on the glass surface and then wiping it clean with a dry towel; 2. Turn on the windshield wipers by setting them to a low speed and letting them run until the fog disappears; 3. Change the air source—most cars have a button to recirculate the air inside the car or draw in air from outside; 4. Lower the temperature inside the car. Since fog is caused by temperature differences, matching the interior temperature with the outside temperature can reduce fog. Set the car fan to the highest setting and lower the temperature as much as possible.
Every time I drive in the rain, I always worry about the windshield fogging up and affecting visibility. I remember one winter when I was taking my child to school, the windshield was completely fogged up. I quickly turned on the air conditioning, set the fan to maximum, and directed the airflow toward the windshield. It's recommended to use the external circulation mode, which draws in dry air to help dehumidify, and the effect is super fast. In summer, try using cold air to defog, while in winter, warm air is more comfortable—just don’t turn it on too high immediately to avoid temperature differences causing the outer surface to fog up as well. Always keep a clean cloth in the car, but never wipe the windshield while driving—it’s too dangerous. Make it a habit to turn on the air conditioning for a few seconds after starting the car to preheat it, which can also prevent long-term moisture damage to the glass and interior. Fellow drivers have shared that regularly applying anti-fog spray can also help prevent fogging. Keeping a clear line of sight is the foundation of safe driving.
