We had some really awful, dirty guests recently who left our place in a real mess - food stains on bed linen, rubbish all over the place, sandy towels on the sofa, very unpleasant things in the bathroom, lights and fans left running. very disrespectful.
They didn't leave a review - we sent one - 3 stars for everything aside from communication for which we gave them a 4 star rating (they telephoned us and asked for a late checkout which we gave them).
I noticed this person had a review from 2017 which was complimentary but nothing since then
How do we warn other hosts?