Magic Forums

I know this sounds lame, but is there a spell to make someone wash their hands after they use the bathroom [the thing I an on does not have a question mark key, sorry is that makes this post confusing.]
Someone I live with never washes his hands after using the bathroom. I could not tell you how many times I heard him walk straight from the toilet out of the bathroom with out stopping to wash his hands and then watched him as he dug his disgusting hands through bags and tins of food and rumuged through the fridge. He currently has a very contagous stomach bug that makes things worst. Every time I go to say something, his wife hits me. She is more concerned about his FEELINGS than the health and well being of everyone else who lives in this house.
I know this sounds lame, and that magic should not be typically used for everyday problems, but this can cause an out break of a disgusting stomach bug that gives you explosive dihearreha if I do not do anything about it. Is there any spells to make people wash their hands after going to the bathroom [Insert question mark here] can anyone please make one [question mark]