My father is 96 and lives with me and my girlfriend and is in relatively good health for his age. He does have trouble sleeping most nights and on the bad ones I gently swab him with a soft, damp washcloth and that relaxes him and sometimes gets him to sleep. He does respond well to his morning bed bath so I guess physical human contact is very important for him.
In his prime he was an intelligent, capable man with many interests who could suceed at nearly everything he put his hand to. It helps me to remember that when I grow impatient with him now.

Joe, I'll echo the oft-repeated notion here that it's so important to take care of yourself for your own sake and hers.

Thanks to everyone for their contributions to this thread.