Leases often work this way. In theory it's illegal in the UK (for a home, businesses are assumed to be big boys who can negotiate on equal footing) but it's still pretty common to be charged when you move out. Specifically UK law says "reasonable wear and tear" is just an expected cost of people living in a house you let to them - so e.g. they're going to wear out carpet after some years, but a cigar burn is not OK, the walls won't look pristine but there shouldn't be graffiti, that sort of thing. They should vacuum floors but it's not reasonable to expect dust to magically vanish from every nook.

In practice in many cases you move out leaving the place very habitable, you get told they "had" to clean up your mess, and it's a suspiciously round number like £80 and they have plenty more "necessary" charges like this. In theory in the UK they're required to provide receipts showing their actual expense, but in practice they're looking at this as free revenue and most of their clients can't fight back.

I was buying, freeing me from the obvious revenge if I say "Fuck you" but there were a lot of other things to do for the move and having fought them down from the original outrageous fees they wanted I gave up although I did get as far as reporting them to their regulator and threatening legal action. In hindsight I'm quite sure I could have got to $0 and possibly also got the most senior woman who was straight up lying and clearly had done all this many times removed from the register of people fit to let out properties, but I didn't and I feel bad about that.