Posted on 4/28/2025
There’s nothing quite as frustrating as hopping into your car, starting it up, and realizing you can barely see through your windshield—because it’s fogged up from the inside. While external fogging is typically caused by weather, interior windshield fogging is a sign of moisture and temperature imbalance inside your car. It’s a common issue, but one you shouldn’t ignore. Here’s why your windshield fogs up from the inside, what it means, and how to stop it from becoming a recurring problem. What Causes Interior Windshield Fogging? Fogging happens when warm, moist air comes into contact with a cooler surface—in this case, the inside of your windshield. The moisture in the air condenses into tiny droplets, forming that foggy layer. While this is often temporary, chronic fogging can point to underlying issues. Common causes include: High interior humidity Leaks allowing water into the cabin Blocked HVAC drainage Damp floor ... read more