A corridor is not a store
The material in a corridor is usually there because it has nowhere else to go, and once it has been there a fortnight it becomes permanent. The floor beneath is never cleaned again, dust accumulates behind the boxes, and the corridor's width is reduced for everyone who uses it. None of that is visible to a facility manager who walks the route occasionally in daylight.
A cleaning crew working it weekly is well placed to describe what has changed. A short note with the location, roughly how much of the corridor is affected and how long the material has been there gives a facility manager something specific. That description is more useful than a general remark that the corridors are cluttered. Photographs make the duration point far easier to demonstrate.
