Kaz, as an ex accommodation person......
All students should have been given an inventory form to fill in, as soon as they arrived. Also, whoever is actually managing the building (each one will have an accommodation manager) will also have completed an inventroy, very detailed. Well, I hope so.I used to get on my hands and knees

and count each cigarette burn in the carpet.
If all the students get together and do one for the communal areas, things will not be missed.
Take photos, especially of any big marks, like that burn.
And probs, let me know, I'll speak to me chummlies xx