On a working site, the places your people use every day say a lot about how they're looked after. A grimy crib room, a toilet block that's out of paper by mid-shift or dust built up on the stairs to the mezzanine affects morale, and it can turn into a safety issue.
The challenge is that the site never really stops. Forklifts, trucks and shift changes all compete for the same space, and a cleaner who doesn't understand the rules becomes a hazard. Many contractors avoid that by cleaning only the easy areas and skipping the rest.
Site and operations managers need a team that is inducted, wears the right gear, knows where it can and can't go, and does the full scope without supervision.