How to Defog the Car Interior?
2 Answers
Methods to defog the car interior include: 1. Open windows for convection, allowing air circulation to equalize the temperature inside and outside the car, which naturally dissipates the fog; 2. Use the air conditioning in heat mode to evaporate the fog inside the car; 3. Dilute dishwashing liquid with water, dip a clean cloth into the solution, and apply it to the windshield; 4. Use glass anti-fog spray. The reasons for fog inside the car are: 1. Under certain humidity conditions, when the window temperature is lower than the dew point, condensation forms on the window surface; 2. A temperature difference occurs on both sides of the window, with the surface at a lower temperature having a saturated vapor pressure lower than the surrounding environment's vapor pressure; 3. Moisture gathers on the glass surface and forms tiny water droplets, creating fog.
Dealing with foggy windows while driving is really troublesome. I often use the method of turning on the air conditioning with cold air to quickly solve the problem. Cold air can absorb the moisture on the glass surface, making it clear immediately, but it's quite chilly in winter. Using hot air to defog also works, but the fog will initially get worse, so you need to turn on the air conditioning a few minutes in advance. Keeping a dry towel in the car can help in emergencies for a quick wipe. Opening the windows for ventilation is also effective—when driving at low speeds, air convection can help disperse the fog. Pay extra attention on rainy or snowy days when humidity is high. If the fog is severe, pull over to handle it instead of risking driving. Applying anti-fog spray on the inner side of the glass can prevent fogging for a while. Rotating these methods is usually enough.
