The housekeeping industry. Housekeepers are under such tight time restraints (30 min per room) and given like 15 rooms to clean in 8 hrs that they are forced to cut corners. Never trust the coffee pot, towels, bedding (the duvet is never changed only if there’s a strain on it or it smells really bad or something), don’t trust the glasses, and don’t walk around barefoot. I’ve seen housekeepers using the toilet brush to clean the bathtub. And touching the clean towers after touching the toilet. Unfortunately there’s not enough time to really clean so we give the illusion of a clean room. Management only cares that the metal is shiny with no water spots, there’s no hair anywhere, and everything is in its place and looks organized. But really it’s gross!