Hello, Canarygirl, I am so sorry that you and your DH are going through this. My dear Mum, lovely Godmother, and dear M I L, all suffered from dementia in later life, I know how hard it is to keep connected with your loved one when they are slipping away day by day.
With my mum, what helped her stay engaged with us for a while was being prescribed Aricept by her memory clinic. It seemed to keep her more alert for a while, although the consultant explained to us that eventually the condition would ' take over'.
When that happened and she didn't communicate much, or use our names any more, we continued to sing and dance with her, massaged her face and hands with lovely creams, played music that she and my Dad had enjoyed- Johnny Cash!- hoping it gave her some small pleasures.
My daughter in law brought my young grandchildren to visit her, and she smiled when my wee granddaughter was placed in her lap, although she had no idea who she was...sometimes people with advanced dementia can respond well to children, and to pets...
I hope you can find some ways to continue to feel connected with your DH for as long as possible, and I wish you health and strength for the road ahead.??