How to Clean a Skylight to Let in More Natural Light
A dirty skylight can cut out a surprising amount of daylight. A careful clean helps restore brightness and improves the look of the whole room.
Use this simple method to remove dust, streaks and build-up without damaging the glass or frame.
What You’ll Need
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Step-by-Step Guide
Step 1: Make the area safe
Open windows for ventilation and set up a secure step stool or ladder if needed. Keep cloths, water and tools within easy reach before you start.
Step 2: Remove loose dirt
Brush away dust, cobwebs and dry debris from the frame and glass edge. This stops grit from scratching the surface when you wipe it down.
Step 3: Wash the glass
Use warm soapy water and a soft cloth to clean the skylight surface. Work gently so you lift dirt without forcing water into seals.
Step 4: Tackle streaks and marks
Wipe the glass with a clean microfibre cloth or squeegee, then use glass cleaner on any stubborn marks. Dry the edges so no water sits in the frame.
Step 5: Check seals and finish up
Look for cracked seals, trapped debris or signs of leaks while the skylight is clean. Wipe the frame dry and step back to check the light has improved.
- Clean on a cloudy day so the glass does not dry too quickly.
- Avoid abrasive pads that can scratch the surface.
- If the skylight opens, clean the hinges and tracks too.
- Check for leaks while the frame is wet and visible.
Work from a stable platform and never overreach. If the skylight is hard to access or very high, use proper access equipment or get help.
Final Thoughts
A clean skylight can make a room feel brighter straight away. A few careful passes are often enough to let much more natural light back in.
