Skylights are a great way to bring natural light into your home, but because of their position and angle, they can collect dirt more quickly than standard windows. Dust, rainwater marks, leaves and debris can all build up over time, leaving skylights looking dull and reducing the amount of light coming through.
Cleaning a skylight can be done yourself or with professional help, depending on how easy it is to access.
How often should you clean a skylight?
Skylights typically need cleaning more often than vertical windows because they’re exposed to more direct dirt and debris. In many homes, cleaning every 4 weeks helps keep them clear and prevents build-up.
Homes in busy cities, such as London and Manchester, may need more frequent cleaning due to pollution and traffic residue, while homes near trees may see faster build-up from leaves and pollen.
Regular cleaning makes each job easier, as dirt is less likely to become more stubborn to clean the longer you leave it!

What you’ll need to clean a skylight from the inside
For most skylight cleaning tasks, you’ll need:
- A bucket of warm water mixed with a few squirts of washing-up liquid or window cleaning solution
- A squeegee for removing water and preventing streaks
- A soft cloth or microfibre cloth for detailing
- A stable ladder (if required and safe to use)
Some people also use specialist window cleaning tools designed for high or angled glass, which can make the process easier.
How to clean a skylight from the inside
If your skylight can be accessed safely from inside your home, this is usually the simplest way to clean it.
- Start by removing any loose dust or debris with a dry micro-fibre cloth
- Then apply your preferred cleaning solution using a soft sponge or micro-fibre cloth, making sure to cover the entire surface
- Use a squeegee to remove the liquid, working from top to bottom in smooth strokes
- Wipe your squeegee blade between each pass to avoid streaks
- Finish by drying the edges and corners with a clean cloth to remove any remaining water
Can I clean a skylight from the outside?
If you can't clean your skylight from the inside, it's best to hire a professional window cleaning service. Cleaning a skylight from the outside can be more challenging, as it often involves working at height or on a roof, and safety should always come first.
Extendable poles can allow you to clean from the ground. These tools can help you reach the glass without needing to climb. But using them without prior experience can be ineffective, and you may struggle to achieve a streak-free finish.
You can book a professional window cleaner through the Housekeep website. We work with window cleaners up and down the country - including London, Manchester, Bristol and Brighton.