Clean windows are the cheapest refurbishment a building can get. They let noticeably more daylight into the rooms and instantly take the neglected look off an office. On the inside it is mostly dust doing the work: handprints, a film of grease from the tea point, and the fine layer that heated air leaves on the pane over months.
As window cleaners in Ulm we work with the classic tools — applicator, squeegee, a clean edge — and where needed with a reverse-osmosis unit that delivers lime-free water. That purified water dries without residue, which removes both the buffing step and the streaks. For frames, rebates and seals we use separate cloths so the dirt does not travel back onto the glass.
We clean the interior side only — no exterior cleaning, no working at height, no access equipment. This is not a limitation we hide: it is the reason our appointments hold and the fixed price stands even when a pane turns out to be more stubborn than expected.