Frequent and light, not periodic and deep
In a store where stock moves daily, dust never gets the chance to settle and the shelving is disturbed constantly. What accumulates instead is handling residue on the counter, the return bench and the door furniture, plus packaging debris where kits are made up. Those are surfaces that need attention often rather than thoroughly. Kit bags and cases put down on the counter add to it all day.
So the scope inverts the usual storage pattern. A short daily or near-daily attendance on the touched surfaces and the floor, and a much lower interval on shelving and the room's structure. That allocation puts the effort where the use is, and it costs less overall than a weekly deep clean that misses the counter for six days out of seven. Students and staff notice the counter far more than the shelving.
