Schools and childcare centres get used hard. Hundreds of small hands touch the same taps, door handles and desks every day, and young children put those hands straight back in their mouths. When cleaning slips, it shows quickly: sticky benches, bins left full, a toilet block that parents mention at pick-up.
Business managers and centre directors also carry a second worry: who is on site. You need to know the people in your classrooms after hours are checked, consistent and supervised, and that nobody new turns up without warning.
Then there are the holidays. Term breaks are the only real window for deep cleaning, and they go fast. If that work isn't planned well ahead, the carpets, windows and floors wait another term.