Signs your car has a moisture problem
Mold rarely shows up all at once. It usually starts with small clues:
- A musty, earthy smell when you first open the door
- Carpet that feels damp or cold under the floor mats
- Windows that fog up inside and are slow to clear
- White, green or dark spots on carpet, seat fabric or seat belts
- Water stains on the headliner near the sunroof or door tops
Why it happens in a dry place like Roseville
Roseville summers are dry, so mold seems unlikely. But the causes we see here are often seasonal. In summer, the AC runs hard all day. It pulls a lot of water out of the air, and that water is meant to drain under the car. When the drain clogs, it can drip into the front footwell instead, and nobody notices until the carpet smells.
Cars that park in the sun make it worse. A closed car on a hot Roseville afternoon turns into a warm, damp box when there’s wet carpet inside, which is exactly what mold likes.
Winter storms bring the other half. Leaves from street trees clog sunroof drains and the cowl under the windshield, and rain finds its way inside. A car that sits in the garage for weeks, which is common in Sun City Roseville, can hold that moisture for a long time.
Wet gear is the last cause. Damp towels after a day at Folsom Lake, muddy cleats after soccer or a wet dog can soak a carpet that then stays closed up in the heat.