Okay. I stole this idea from Family Fun magazine. George has an awful time remembering to wash his hands. Even when reminded, he balks. This is the solution.
Each time he washes his hands, he gets a (little) sticker. Once his hands are covered- he (and the rest of us) get a treat from Dairy Queen. The hands are actually more covered now but it still requires reminders. At least the hands are getting washed!