I buy houses rather frequently. I don’t go in without bleach and cleaning strength vinegar and baking soda. (Not to be used all at the same time, due to interactions.) Everything from top to bottom gets treated before anyone moves in.
The worst part of hotel and dorm living is fabric. Especially carpeting. My rule is, carpeting is always toxically filthy and the place cannot be truly clean if the carpeting remains.
The dorm (most any dorm) is probably as harmful to lungs as the curriculum is to brains.
I moved into an apt and suspected the industrial short loop carpet hadn’t ever been cleaned. I rented a machine...and the THIRD pass over the carpet produced water as jet black as the first. Took about 6 passes be for the water went light grey.
I have done my share of cleaning , hospital rooms, nursing homes and carpet is the worst. Nothing but a giant breeding ground for filth. I prefer wood floors or ceramic tile.