How to Deal with Foggy Windshield?
4 Answers
Press the defogger switch, and the indicator light will illuminate. The defogger will work for a period of time, and the fog will disappear. After exceeding the preset time, the defogger will automatically turn off. Use the air conditioning in conjunction with the defogger. You can turn on the A/C switch of the air conditioning, set the temperature to the lowest, use the internal circulation, and turn on the front windshield defogger.
Fogging is a very common issue, especially during rainy days or sudden temperature drops. When there's a significant temperature difference between the inside and outside of the car, moisture condenses on the windows, obstructing the view and creating a dangerous situation. I usually turn on the heater and direct it at the windshield to blow hot air, which quickly evaporates the fog. In hot and humid summer weather, switching to the air conditioner's dehumidification mode is also effective, as the cold air quickly removes moisture. Opening the windows slightly to allow air circulation is the simplest solution—don't worry about rain getting in; even a small crack makes a noticeable difference. Most new cars come with a defogging button that does the job effortlessly. For prevention, I like to use anti-fog spray to wipe the inside of the windows regularly and keep a small dehumidifier pack in the car to absorb moisture, significantly reducing the frequency of fogging. The key is not to overlook driving safety—if the fog is too thick and visibility is poor, I pull over to deal with it rather than stubbornly continuing to drive. Safety always comes first.
Dealing with foggy windshield glass is actually quite straightforward—it's mainly caused by condensation when high humidity inside the car meets the cold glass surface. For solutions, I recommend turning on the heater to blow warm air directly onto the glass or activating the air conditioning's dehumidification function; using both methods together yields better results. Don't forget to slightly open windows to balance humidity, and the external air circulation button can also help prevent persistent fogging. In practice, I always check if wet floor mats are increasing overall cabin humidity and regularly clean air filters to ensure proper ventilation. For prevention, applying anti-fog agents to wipe the inner side of the glass provides longer-lasting protection against fog formation compared to dry cloth wiping. In cases of heavy fog, I prioritize using the defroster first, then drive slowly or pull over for safety—these small habits make driving much more comfortable.
Turn on the heater and direct it towards the windshield when it fogs up! In summer, use the air conditioning in dehumidification mode to quickly dissipate moisture. Cracking the windows slightly to allow air circulation also helps. If your car has a defogger button, simply press it for a quick and efficient solution. Regularly clean the inside of the windshield with a soft cloth to prevent fogging. Don’t wait until heavy fog appears to take action—preventive measures in daily use are the most hassle-free.
