Skylights bring natural light and beauty into your home, but over time, they can accumulate dust, dirt, pollen, and even mold, reducing their efficiency and clarity. Regular cleaning keeps them looking great and ensures maximum light transmission.

If you’re wondering how to clean a skylight safely and effectively, this guide will walk you through the process—whether it’s an interior or exterior skylight.

Why Clean Your Skylight?

Before diving into the cleaning process, let’s look at why it’s important:

✔ Improves Natural Light – A clean skylight allows more sunlight to enter.
✔ Prevents Buildup – Dirt and debris can lead to stains, mold, or water damage.
✔ Extends Lifespan – Regular maintenance prevents seal deterioration.
✔ Enhances Curb Appeal – Clean skylights make your home look well-maintained.

How Often Should You Clean a Skylight?

• Interior Glass: Every 3–6 months (dust and condensation buildup).
• Exterior Glass: At least twice a year (more if near trees or in dusty areas).
• After Storms: Check for debris, leaves, or bird droppings.

How to Clean an Interior Skylight (From Inside)

Tools You’ll Need:

• Microfiber cloth or sponge
• Mild dish soap or vinegar solution
• Distilled water (prevents streaks)
• Squeegee (for large skylights)
• Ladder (if the skylight is high up)

Step-by-Step Cleaning:

1. Dust First – Use a dry microfiber cloth or duster to remove loose dirt.
2. Prepare Cleaning Solution – Mix warm water with a few drops of dish soap or equal parts vinegar and water.
3. Wipe Gently – Dip the cloth/sponge in the solution and clean the glass in circular motions.
4. Rinse & Dry – Wipe with a damp cloth to remove soap residue, then dry with a clean microfiber towel.
5. Use a Squeegee (Optional) – For streak-free results, especially on large skylights.

How to Clean an Exterior Skylight (From Outside)

Cleaning the exterior is trickier due to height and safety concerns. If your skylight is hard to reach, consider hiring a professional window cleaner.

Tools You’ll Need:

• Extension pole with a soft brush attachment
• Garden hose with spray nozzle
• Bucket of soapy water (or vinegar solution)
• Safety harness (if climbing onto the roof)

Step-by-Step Cleaning:

1. Safety First – If using a ladder, ensure it’s stable. Avoid walking on the roof if it’s steep or slippery.
2. Remove Loose Debris – Use a soft brush or leaf blower to clear leaves and dirt.
3. Apply Cleaning Solution – Use the soapy water or vinegar mix with a sponge or spray bottle.
4. Scrub Gently – A non-abrasive brush helps remove stubborn grime without scratching.
5. Rinse Thoroughly – Use a hose to wash away soap and dirt.
6. Dry (If Possible) – Let it air-dry or use a squeegee to prevent water spots.

Tips for Maintaining Skylights

• Check Seals & Flashing – Ensure no cracks or leaks around the frame.
• Trim Overhanging Branches – Prevents leaves and debris buildup.
• Clean Screens & Shades – If your skylight has them, remove and wash them separately.
• Avoid Harsh Chemicals – Ammonia or bleach can damage glass coatings.

When to Call a Professional

If:

• Your skylight is too high or dangerous to access.
• There’s condensation between panes (sign of seal failure).
• You notice cracks, leaks, or damaged frames.

A professional skylight repair company can handle tough jobs safely.

Final Thoughts

Cleaning your skylight doesn’t have to be a hassle—with the right tools and techniques, you can keep it sparkling inside and out. Regular maintenance ensures better light, energy efficiency, and longevity.

If you’re uncomfortable cleaning high exterior skylights, hire a trusted professional to do the job safely.

Need Help with Skylight Cleaning or Repair?

Ontario Tech Roofing offers skylight maintenance and inspection services in Ontario. Contact us today at 905-616-4408 or visit Ontario Tech Roofing for a free estimate!

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