Zones rather than individual desks
Directing a cleaner to specific desks sounds precise and works badly. It requires accurate nightly information, it slows the attendance down considerably, and it is almost impossible to verify afterwards. Dividing the floor into a handful of zones and applying a rule at zone level captures most of the benefit while remaining something a cleaner can actually follow at nine in the evening.
A typical arrangement might treat a zone as fully used if bookings exceeded a stated proportion, and lightly used below it. The full treatment covers workstation surfaces, chairs, waste and floors; the lighter pass covers waste, floors and a check. That distinction is simple enough to be applied consistently and meaningful enough to change where the time actually goes.
