@Rachel768
Yes Rachel give him a poor review and mark him badly for cleanliness. Maybe even give him a thumbs down! Guests are expected to leave the property the way they found it and if they don't, you do need to warn other hosts.
It is best to possibly do it in a sacastic form because you get your point across without actually accusing the guest of anything specific.....
"It was a pity that 'Nigel' found an urgent reason to finish his stay, we had a devil of a time cleaning up after him and if the opportunity arose to host him again I would have to decline the invitation"
You haven't accused him of being anything other than a slob! The rest of us will get the hint Rachel, most of us are not fools....we don't need a ....'he left all his dishes in the sink, he smeared something all over the walls, he left stain in the toilet, he did not take his garbage out.......That is just plain 'voyeurism', looking for a Cecil B Demilles epic. As I said we are not fools and when a host says a guest would not be welcome again, that is all we need!
Cheers.....Rob