What Are the Methods to Deal with Foggy Windshields in Hot Weather?
3 Answers
The simplest method is to turn on the air conditioning and direct cold air towards the front windshield, utilizing the dehumidification function of the AC to remove the fog. Other methods for dealing with foggy windshields in hot weather include: 1. Detergent-based solutions: Dishwashing liquid or soap can be used for car glass anti-fogging. Principle: They disrupt the attraction between water molecules, reducing surface tension and causing water molecules to distribute evenly on the treated glass surface, forming a water film. The more rainwater on the glass, the larger the water film, keeping the car glass clear. 2. External circulation defogging: Suitable when it's not appropriate to open windows, such as during rain. Principle: Turn on the external circulation defogging, with the correct vent settings to blow air towards the front windshield and footwell simultaneously, or just the front windshield. 3. Anti-fog spray: Can be used for defogging car windows. Principle: Absorbs moisture on the glass surface, forming a water film that prevents fogging by stopping moisture from adhering to the glass. Wiping the car windows with a cloth keeps them clear, with effective and long-lasting defogging. 4. Rolling down windows: After driving outdoors, park and open the windows to let hot air in for two to three minutes, and the fog will disappear automatically.
Dealing with foggy windshields on hot days is really annoying. When I encounter this situation, I usually turn on the air conditioner's dehumidification mode first, set the temperature to around 23°C with the highest fan speed, and switch to external circulation to let dry air in. Direct the air vents toward the glass, and the fog will clear up in a few minutes. Opening the window a bit also helps, especially on highways—just crack it open to allow air circulation and reduce humidity. Remember to wash your car and clean the glass regularly; less oil film means less fog buildup. Carrying a defogger spray is handy—one spray can last half a day. Safety comes first; if the fog is too thick, don’t push through—slow down, pull over, and deal with it before continuing to avoid accidents. Over time, you’ll find these little tricks quite practical.
As a young driver, I like to take shortcuts when driving. To deal with foggy windshields on hot days, I use quick fixes: press the car's defog button (if available), turn on the AC, set the fan to maximum, direct the vents upward, and turn on the external circulation until the fog clears. If that doesn't work, I open the windows to let the moisture escape, which is most effective in good weather. I also keep some defogging spray in the car—just wipe and it clears up. Regularly cleaning the glass with wipers helps maintain clarity. Be careful not to leave wet items, like swim bags, in the car to prevent fogging. Most importantly, stay calm, drive slowly without distractions, ensure clear visibility before accelerating, and prioritize safety to develop good habits for convenient travel.
