Start the car after a night parked outside during a Canadian winter and it's extremely common to find both the windshield and the dashcam lens fogged over — leaving you with a blurry, unusable recording right at the moment you might most need clear footage.

Why It Fogs Up in the Cold

Fog forms on the lens when a large gap between indoor and outdoor temperature causes condensation to form directly on the lens surface. Cranking the heater up too aggressively right away can actually make the fogging worse rather than better, by widening that temperature gap even further in the short term.

Anti-Fog Coatings and Vented Housings

Some premium dashcams use vented housings or moisture-resistant coatings built specifically around the lens area to reduce fogging in exactly these conditions. If you live somewhere with a long, cold winter, that's a feature genuinely worth prioritizing when comparing models rather than an overlooked extra.

A Few Practical Habits That Help

Give the windshield a few minutes to fully defog before you actually set off driving — the dashcam lens tends to clear along with it as the cabin warms evenly. A small moisture absorber placed near the dashboard can help reduce ambient humidity as well, which lowers how badly things fog up in the first place.