Hi Mary, I would definitely not tell him that he has dementia. Since he doesn’t remember, it’s best to just let it go—you’ll both be happier in the long run! The teeth brushing and bathing problem is a common one with dementia. I think the first thing that you need to do is get him in a routine. When did he usually brush his teeth? What time of day did he usually bathe? Use what you already know about him to create a schedule that works for both of you.