
Using the air conditioning to defog is a common practice. Turn on the cold air and blow it onto the glass for a direct defogging effect. Lower the side windows slightly to allow air convection inside the car. When the interior temperature approaches the outside temperature, the fog will dissipate. Mix dishwashing liquid and water in a ratio of about 1:10, then use a clean, soft cloth to apply the solution to the inside of the front and rear windshields.

When the windows fog up, I usually turn on the air conditioning immediately and set it to the windshield defrost mode. Setting the temperature to warm or hot air is most effective, as it quickly removes moisture. If there's no rush, slightly opening the windows to allow air circulation can also gradually clear the fog. I always keep a bottle of anti-fog spray in the car, and wiping the glass clean before use works even better, especially during winter rainy days when fog comes on strong—safety first. Remember to check if the wipers are clean before driving, as dirt can worsen fogging. Some people take the shortcut of wiping the windows with their hands, which provides a temporary fix but leaves streaks that impair visibility. It's safer to use professional methods.

The fog mainly comes from the moisture inside the car meeting the cold glass. My approach is to turn on the air conditioning dehumidification function, press the defogging button, and increase the airflow towards the windshield. If the rear windows fog up, I turn on the rear window heater—those heating wires are very effective. I usually avoid running the car humidifier for too long, keeping the humidity lower when there are fewer people in the car. Using warm air for defogging is more efficient in dry and cold weather, but it's important to check that the air filter isn't clogged. These habits have helped me avoid a lot of trouble.

As a long-distance driver, safe defogging is crucial. When fogging occurs, I immediately slow down or pull over, turn on the fan and air conditioning dehumidification mode, and select the front windshield vent. I carry a small sponge to assist in wiping the fog, but avoid overdoing it to prevent distraction. In winter, I preheat the car interior a bit before hitting the road. Remember to regularly replace the air filter and clean the inside of the windows, as prevention is more important than emergency measures. After the fog clears, gradually return to normal speed. This method is simple and practical, and with practice, it becomes a natural reaction.

I prefer energy-saving methods for defogging, as not using the AC can save fuel. For example, when the fog is light, I open both side windows for cross-ventilation to balance humidity and naturally reduce fogging. Alternatively, I gently wipe the glass with a warm, damp towel to prevent condensation. Having fewer people in the car and placing a pack of desiccant inside to absorb moisture also helps. On summer mornings when fog is heavy, I start the car five minutes early to circulate outside air before getting in. These methods are slower but eco-friendly and don’t compromise driving comfort. I also pay attention to weather forecasts to adjust my entry and exit times, preventing fog buildup in advance.

The new car comes with a system that makes defogging super convenient. As soon as I get in, I press the automatic air conditioning button and set it to defog mode—it automatically adjusts the airflow and temperature to clear the fog. On the touchscreen, I can also select precise vent positions, such as the front windshield or side windows. Additionally, I use the mobile app to preheat the windows before driving. During routine maintenance, I clean the sensors and air conditioning ducts to ensure quick responsiveness. This high-tech feature gets the job done with just a touch, saving time and effort, especially for busy commuters in a hurry.


