Last year my sister gave my Dad a book on home remedies. We all thought it was kind of an odd gift, but he really embraced the whole concept.
When he got a toe-nail fungus he looked in the book and it said if you soak your feet nightly in Listerine that the fungus would go away. Well as much as my mother tried to tell him to use the clear Listerine, he would only use the green.
My dad is a really good sport!