This is normally due to a poor level of service where the debris hasn't been cleared properly, which normally leads to debris cluttering up and causing abrasion to the window. Other occurrences of scratched windows can occur when the person carrying out the window cleaning is inexperienced.

Active member. It won't or shouldn't be the brush bristles that will cause scratches on the glass, if it is caused when you are cleaning it will most likely be dirt trapped in the brush bristles that can and do cause scratching. The answer is these types of brushes have to used more slowly.

These tiny particles can detach during the normal, everyday, window cleaning process and can cause major scratching, often over the entire glass surface. This doesn't just apply to smaller window cleaning jobs.

Spray your windows with a generous amount of glass cleaner. Using a lint-free paper towel or microfiber cloth, wipe your windows from top to bottom. If you see any streaks, give them another wipe until the glass is clear.

in 5 Steps Dust and brush down the windows. The first step to clean your windows without streaks is to remove any excess dirt, dust, and cobwebs. ... Pick a detergent and start washing. ... Squeegee the window dry. ... Wipe the window down with a cloth. ... Clean up the window sills and floors.

The best way to clean glass windows or tabletops is by using either a coffee filter or a microfiber cloth. In the end, using microfiber cloths or coffee filters is a bit easier and yields more or less the same streak-free shine a properly wielded squeegee would.