This is possibly only one reason, but the penny dropped for me when I put 2 facts together. The first one was that MH hasn't recognised himself in photos for over a year. I had a nice photo of him on the dining room table and one day he turned it face down. I realise now that he thought it was a stranger. Second fact, the large bathroom mirror which would make him think there was a stranger in the room watching him. So perhaps covering or removing mirrors might make a difference. MH has ripped the mirror off the wall in his room at the rest home, so again when looking in the mirror he sees a stranger looking back. So sad.