I saw a product online that seemed funny at first and then made total sense. It's a "wallpaper" to put onto a door you do not want your dementia'd person to open-- it looks exactly like a full bookshelf.

The best tip I can share is that when the person no longer knows that you are you-- and thinks you are someone else they remember-- just go with it. They have happiness associated with that person, probably, so let them be happy. Correcting them will only cause them hurt-- and the information will not stick anyway.

~S~