Condensation on windows causes mold and damage. Here’s how to fix it.
What Causes Window Condensation? High indoor humidity, poor ventilation, or failed window seals.
Step 1: Reduce indoor humidity with a dehumidifier.
Step 2: Improve ventilation — open windows briefly each day.
Step 3: Check if condensation is between the glass panes — this means the seal has failed and the window needs replacing.
Step 4: Apply anti-condensation window film to single-pane windows.