Foggy Car Windows: Simple Habits for Clear Glass in Cold Weather

Fogged-up windows are more than an annoyance. They cut visibility right when you need it most. Fog forms when warm, moist air inside the car meets cold glass, so the fix is to reduce moisture and keep the glass clean.

Why windows fog up

Your breath, wet coats, damp floor mats, and even a stray coffee cup all add moisture to the cabin. When that humid air touches cold glass, it condenses into a thin layer of droplets.

Quick ways to clear fog while driving

• Turn on the defroster and direct airflow at the windshield.
• Use the air conditioning if your vehicle supports it, since it helps remove moisture from the air.
• Set the system to fresh air rather than recirculation so humid air can leave the cabin.
• Crack a window briefly if fog is heavy.

Follow your vehicle manual for the recommended defrost settings.

Prevent it before it starts

• Shake off snow and water before you get in.
• Remove wet mats or let them dry indoors.
• Keep the interior free of damp items, like towels or umbrellas, left inside.
• Run the fan for a minute before shutting the car off to help dry the cabin.

Keep the inside of the glass clean

A film of dust and oils on the inside of the windshield gives moisture something to cling to. Clean the inside glass regularly with a streak-free glass cleaner and a clean microfiber towel, wiping in one direction and finishing with a dry towel. Avoid touching the glass afterward, since fingerprints add oils back.

Find glass cleaners and microfiber towels in our Window & Glass Care collection.