How to Deal with Foggy Windows When Driving in Winter?
3 Answers
Solutions for foggy windows when driving in winter include: 1. Crack open the car window slightly to allow air circulation between the inside and outside of the car, which can help dissipate the fog on the windows after a while. 2. Use cool air to defog; simply set the air conditioning to an appropriate level and use the air blown out by the AC to remove the fog. 3. Use warm air to dissipate the fog. 4. In winter, you can wipe off the fog on the windows with a soft towel or a car-specific anti-fog towel. 5. You can use a car-specific defogging spray; alternatively, mix dish soap with water in a 1:6 ratio and apply it to the windows to prevent fogging for 7-8 days.
It's quite annoying when the car fogs up in winter. I usually turn on the heater and direct it toward the windshield first, as the air conditioning can dehumidify; at the same time, I press the defog button, which most cars have. If the fogging is severe, I’ll crack open a window slightly to allow air circulation and reduce moisture buildup. Sometimes, wiping the glass with a clean microfiber cloth is also very effective, but I have to pull over to a safe spot to do it. For prevention, I try not to leave damp items like umbrellas or clothes in the car, and I also check if the ventilation system is working properly. Regularly cleaning the inside of the windows helps too—anti-fog sprays have worked well for me a few times, especially when applied before rainy days. In short, acting quickly is key, as poor visibility can easily lead to accidents. Once you develop these habits, winter driving becomes much more hassle-free.
Fogging inside the car is often caused by temperature differences leading to condensation on the windows. I recommend immediately turning on the air conditioning system and switching to external circulation mode, as this draws in dry, cold air for faster dehumidification. Avoid using internal circulation as it will only make the fog worse. Simultaneously, direct the defroster vents at the windows and set the temperature slightly higher—results should be visible in about five minutes. For prevention, warm up the car for a few minutes in winter to let the engine preheat and balance the interior humidity. I've also found that keeping windows free of grease and stains helps, so clean them regularly with a mild detergent. If fogging persists, check if the car's air filter is clogged—replace it if dirty. While driving, avoid heavy breathing or bringing wet items into the car, as small issues can accumulate into bigger problems.
