What Causes Windshield Fogging in Summer?
1 Answers
Fogging on the inside of the windshield in summer is caused by the temperature difference between the interior and exterior. When the window temperature falls below the dew point, the air's moisture content is insufficient to form water droplets, resulting in tiny water particles that condense on the window surface, creating the fogging phenomenon. Solutions for Windshield Fogging: Using Detergents: Dish soap or soap can be used to prevent fogging on car windows. Soften the soap by soaking it in water, then apply it evenly on the glass surface. Once the soap dries, wipe it off with a tissue or newspaper. For dish soap, mix water and soap in a 9:1 ratio, spray it on fog-prone windows during rainy weather, let it dry, and then gently wipe it off with a soft tissue to prevent fogging. External Air Circulation: If rain is frequent and opening windows isn't practical, use the external air circulation mode for defogging. Proper vent settings should direct air to both the windshield and footwell or just the windshield. For vehicles with automatic climate control, the compressor may not activate at lower temperatures, so allowing interior and exterior air to circulate can help disperse fog. Anti-Fog Sprays: There are specialized anti-fog sprays available for car windows. These products absorb moisture from the glass surface, forming a thin film that prevents fogging. After application, wipe the window dry with a cloth to maintain clear visibility, with long-lasting effects. Window Adjustment: After driving outdoors, park and open the windows to let warm air in. Within a few minutes, the temperature difference will decrease, and the fog will dissipate. If parking isn't an option, use windshield wipers to clear fog from the front and rear windows. For side windows, rolling them up and down can help remove fog by scraping it off with the window seals.
