My husband used to do this until we found out that he had diabetes. Now he is wide awake in the evenings now that his sugar is under control. Worth checking out. I know you say he won't go to the doctor but I just make the appointment and then confront him with it.
What was the name of the corner shop you went to as a child?
Am I being taken for granted, or is this just what being a grandparent is today?

