My FIL (full time in depends) uses his hands all the time to assist himself with bowel movements. He is 95 years old and apparently has been doing this for years. He thinks that a quick swipe with dry toilet paper is enough and refuses to use the wet wipes. He is in a wheelchair and I get him to the sink to wash as much as possible. But when I leave the room I have little assurance that his hands are not "down there." Then he wheels himself around and touches stuff in the house, refrigerator etc. I am specific about rules etc but he is very stubborn. Any ideas?