I'm annoyed at my SO for messing up a room I just cleaned before a rental inspection
So your partner ruined the room?
Yes, for this reason I am mad at them.
I would be upset, too! Your SO should have recognized that you had cleaned the room for a specific purpose. I would recommend talking to them about how their behavior made you feel.
I'm still mad, though I don't know how to react to this. I'll think of something.
Whatever you do, please do it in a calm manner.