I agree (again) with MTG. The tenant has to be responsible for the damage.
Isn't it a wonderful state of affairs though, when, to emphasise a point, somebody smashes a window or door and our caring 'police service' couldn't give a toss? This is where a lot of the problems stem from, in that if the little things are ignored, then the culprits go on to bigger things, with no fear of retribution, until there is state of virtual anarchy. There is a good case for a zero tolerance policy as advocated by some.
I offer no guarantee that anything I say is correct. wysiwyg