Glass Door Cleaning
High-traffic entry glass and door panels.
The entry door is the most-touched piece of glass a business owns, and the only one every single customer makes contact with. Every arrival leaves something on it. By the middle of a busy afternoon the push area is a solid arc of overlapping prints, at the exact height an adult's eye lands.
It is also the fastest thing on the building to undo everything else. You can have the whole frontage done properly and a smeared entry door will still be the thing somebody notices, because it is the piece they are looking at while they wait for the person ahead of them to go through.
So it gets treated as its own surface rather than as one more pane in the run — both faces, the push plates and handles, the frame, and the glass either side of it that gets touched almost as often.