How to Clean Skylights Safely (Without Streaks or Scratches)
Skylights bring in natural light, but their height, slope, and awkward access make them one of the trickier surfaces to clean safely — and one of the easiest to damage with the wrong products. Here’s the process that actually holds up across the trade.
100+ REVIEWS |
INSURED & BONDED |
100% SATISFIED CLIENTS
How often should skylights be cleaned?
A commonly recommended baseline is about twice a year, though that shifts depending on exposure. Homes near mature trees, in areas with frequent storms or heavy pollen, or anywhere birds are active nearby typically need more frequent attention, since debris and staining build up faster. A tree-covered, rainy climate is exactly the kind of environment where twice-a-year is closer to a minimum than a fixed rule.
What’s the right way to clean a skylight?
1. Clear debris before introducing any liquid.
Use a soft brush, microfiber duster, or — for exterior buildup like leaves and twigs — a leaf blower to clear loose material from the glass and surrounding frame first. This isn’t just about cleanliness; leftover debris under a wet cloth is a common cause of scratches during washing, and clearing it also keeps drainage channels around the frame from clogging.
2. Wash with a mild solution.
A mix of mild dish soap and warm water is the standard, safe choice for most skylights. For tougher grime, a small amount of white vinegar added to the solution helps break it down without introducing anything harsh.
3. Rinse thoroughly.
Leftover soap residue is a common cause of streaking — and it can actually attract more dust over time — so a full rinse before drying matters more than it might seem.
4. Squeegee and dry
A rubber-bladed squeegee removes excess water cleanly; finish the edges and corners with a lint-free cloth for a streak-free result.
5. Check the frame and flashing while you’re up there.
Since you’re already inspecting the glass closely, it’s worth looking for cracks, loose seals, or signs of moisture intrusion around the frame — catching a small seal issue early is a lot cheaper than the water damage that follows if it’s missed.
What should I avoid using on a skylight?
Abrasive pads or harsh scrubbing, for one — they’re a common source of scratches, especially on triple-glazed units, which shouldn’t be cleaned with excessive pressure. The bigger caution is chemical: ammonia- and alcohol-based cleaners should be avoided on acrylic skylights specifically, since they can damage the acrylic material or any protective coating on it. If you’re not sure whether your skylight is glass or acrylic, that’s worth confirming before reaching for a stronger cleaner.
Is it safe to clean a skylight from a ladder myself?
It can be, with real precautions. A commonly cited safety ratio for ladder placement is 1:4 — the base of the ladder should sit one foot away from the surface for every four feet of ladder height — and having a spotter hold the ladder is a consistent recommendation, not an optional extra. Non-slip shoes and, where the height or slope warrants it, a safety harness are worth using rather than skipping. For skylights that are especially high, steeply angled, or otherwise hard to reach safely, hiring a professional is the more sensible call — the risk of a fall isn’t worth the cost of a cleaning.
Got Questions?
We’re happy to help. If you can’t find the info you’re looking for, please don’t hesitate to reach out to us!
Call us (323) 831-1260
