I expect we would all say that we clean and leave things in a good state. But many house sales occur when older people die, maybe there is nobody to clean the house.
It is fairly obvious when viewing a potential home to purchase whether the occupiers were "clean" or "dirty". Muck doesn't accumulate in the few months between viewing and purchase. If it was mucky when viewing - then odds are that it will be mucky when they leave.
AIBU To Be So Annoyed at the Stupidity of This
Father's Day Sunday — nobody makes cards for this type of dad


