How to Clear Fog on the Outside of the Windshield?
2 Answers
To clear fog on the outside of the windshield, you can slightly open both windows to allow air circulation, which helps eliminate the temperature difference on both sides of the windshield, making it difficult for fog to form. Alternatively, you can spray an anti-fog agent on the windshield. The principle of the anti-fog agent is simple: spraying a layer on the windshield forms an effective protective film, preventing water vapor from condensing. Here are some additional details: 1. Precautions: It is important to note that you should never use a towel to remove fog while driving. Some drivers like to keep a towel or a box of tissues in the car. Once fog appears on the windshield, they wipe the glass vigorously while waiting at a red light or parked on the roadside. Although this method is somewhat effective, it has obvious drawbacks, as wiping can sometimes leave streaks on the glass, and the fog may quickly reappear. 2. Hazards: If you are driving on a highway and cannot stop, not being able to see ahead due to fog can be very dangerous. Therefore, using a towel to wipe fog is not recommended.
I remember one winter when I was driving, the windshield fogged up badly on the outside, affecting visibility. This usually happens because the outside temperature is low, and the glass surface is also cold, causing moisture in the air to condense into fog. The solution is to start the car and immediately turn on the wipers for a few swipes. The rainwater or the action of the wipers can remove most of the fog. If the fog is very thick, find a safe place to stop and gently wipe the outside of the glass with a clean cloth or tissue. Never reach out to wipe while driving—it's too dangerous. Prevention is also important. When parking, leave a small gap in the window to let heat escape, reducing humidity inside the car and making fog less likely to form. It's also a good idea to regularly check the wiper blades and replace them if they're worn out, as new blades can more effectively clear the glass surface. These methods are simple and effective—keeping the windshield clear is one of the keys to safe driving.
