Why Your Windows Get Covered in Moisture Every Morning
The foggy, wet look on your windows isn’t random — it’s basic physics.
Condensation happens when warm, moist indoor air meets a cold surface — like your window glass. In winter, this effect is especially strong because:
Outdoor temperatures are low.
Your home’s interior air is warm.
Warm air holds more moisture.
When that warm air touches cold glass, moisture turns to liquid.
This is especially common:
After cooking or taking hot showers.
In kitchens and bathrooms.
When drying laundry inside.
Overnight, when rooms are closed up.
Everyday activities can add several liters of moisture into the air — and the windows are often the first place it shows up.
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