How to Defog the Front Windshield of a Car?

[McMason]

Here are the solutions for defogging the front windshield: 1. Use the air conditioner's cold air: If the front windshield fogs up, the fastest and most effective method is to immediately turn on the air conditioner's cold air, increase the fan speed, and direct the cold air toward the front windshield. Cold air can quickly lower the temperature of the windshield, eliminating the conditions for fog formation, making this method fast and effective. However, prolonged use in low winter temperatures can make the interior colder, so switch to warm air after the fog dissipates. 2. Use the air conditioner's warm air: Warm air reduces the temperature difference between the inside and outside of the window, allowing fog to evaporate quickly. This method is more effective than using cold air and is suitable for use when starting the car in the morning. After defogging, the windshield will remain clear while driving. 3. Open windows for convection: If the fog is light, slightly opening the windows allows hot and cold air to circulate, reducing the temperature difference and removing fog. However, this method should be used cautiously in freezing weather, rain, or when driving at high speeds. 4. Use defogging spray: Clean the front windshield thoroughly and apply a professional defogging spray. A liquid film will form on the windshield; once dry, wipe it off with a towel to effectively prevent fogging. Alternatively, mix cleaning solutions like detergent, hand soap, shower gel, or shampoo with water in a 1:6 ratio and apply it to the windshield. After drying, wipe off any residue with a clean cloth to achieve defogging.