How to Solve Windshield Fogging?
3 Answers
Methods to solve windshield fogging include: 1. When the fog is light, open the car windows—when the inside and outside temperatures are similar, the fog will dissipate; 2. Turn on the car's air conditioning in cooling mode; 3. Activate the heating system before driving; 4. Use the car's defogging function; 5. Apply a mixture of dishwashing liquid and water or soapy water to the windows; 6. Place dehumidifying boxes used in wardrobes. The reason for windshield fogging is the large temperature difference between the inside and outside of the car, where the cabin temperature is higher than the outside, causing moisture inside the cabin to condense on the inner windshield and form fog. Methods to maintain the windshield include: 1. Use specialized or suitable wiper blades and replace them promptly to avoid scratching the windshield; 2. Remove debris from the windshield; 3. Use automotive-specific glass cleaner.
Windshield fogging is quite common, especially when driving in cold or rainy weather. The temperature difference between the inside and outside causes moisture to condense on the glass, affecting visibility. Having driven for decades, I immediately turn on the air conditioning whenever this happens—pressing the defog button or setting the fan to maximum airflow toward the windshield works best, as it quickly removes the moisture. If it's cold outside, using a bit of warm air helps; avoid washing with cold water, as it can make fogging worse. Sometimes, cracking the windows for ventilation provides quick relief, especially when there are many passengers exhaling moisture—this method is most effective. I also frequently use preventive tricks: regularly cleaning the glass with detergent to keep it dust-free, placing dehumidifier packs inside to absorb moisture, and preheating the car for a few minutes in winter to reduce the temperature gap. Remember, safety comes first—never wipe the glass while driving, as it’s dangerous and can lead to accidents due to distraction.
When fogging occurs, I simply turn on the air conditioning's defogging mode to handle it effortlessly. Most modern cars have this feature with one-touch activation, making it convenient and efficient. Moisture accumulates on the inside of the windshield mainly due to temperature differences or poor air circulation in the car. I usually make it a habit to keep the vehicle dry, keeping a small dehumidifier box and anti-fog spray on hand for emergencies. The key to defogging is controlling the airflow and temperature, and turning on a bit of external circulation to let fresh air in speeds up dehumidification. Even if fogging happens on the highway, I don’t panic—just adjust the air conditioning to medium and blow it on the glass for a few minutes to clear it up. For prevention, remember to regularly clean the air conditioning system and replace the filters to ensure the vents aren’t blocked, which can reduce the likelihood of daily fogging.
