How to Solve Fogging on the Outside of the Car Windshield?
3 Answers
Here are specific solutions for fogging on the outside of the car windshield: 1. Air Conditioning Defogging: 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. The fog on the glass will disappear shortly. 2. Air Convection: This method is suitable for very few situations. Opening the windows increases air convection, reduces the temperature difference inside and outside the car, and weakens the conditions for fog formation. However, it's rarely practical. For example, if it's raining outside, you can't keep the windows open, and the incoming air is quite limited. 3. Defogging Spray: (1) Simply spray it evenly on the glass surface and wipe it clean with a dry towel. (2) The principle involves using surfactants to leave a protective film on the glass surface, altering the surface tension of water molecules, causing fog droplets to coalesce into larger droplets that don't obstruct vision. 4. DIY Defogging Spray with Dish Soap: Mixing dish soap with water is a good method. Prepare a solution in a 1:6 ratio of dish soap to water, store it in a bottle, and spray and wipe before heading out.
Every time I drive and there's fog outside, I immediately turn on the wipers for a couple of sweeps, which usually clears it up. If the weather is cold or the humidity is high on rainy days, and the wipers aren't as effective, I turn on the air conditioning to the cold air mode and direct the vents towards the windshield. It usually takes about ten seconds to see results. Temperature control inside the car is also crucial. In summer, avoid setting the air conditioning too high to prevent large temperature differences between inside and outside, which can lead to more condensation. In winter, a bit of warm air combined with the wipers works well. I've been using these methods long-term, avoiding obstructed vision and significantly improving driving safety. Additionally, every few weeks, I apply an automotive anti-fog spray to the glass and wipe it down. This creates a coating that reduces the chance of fogging, which is quite convenient and doesn't require frequent reapplication.
Having driven for many years, I place great emphasis on safety. Fogging on the outside of the windshield can obscure vision, which is very dangerous. When this happens, I immediately slow down, find a safe place to pull over temporarily, and then turn on the wipers to clear the fog. If the fogging is heavy, I activate the front windshield heating function while adjusting the air conditioning to the defrost setting. As a preventive measure, I keep the window glass clean to avoid dust buildup and minimize the temperature difference between the inside and outside of the car while driving—for example, by not setting the air conditioning temperature too low. This has helped me avoid many potential accidents.
