Daddy doesn't have a germ problem, he has a giving-up-control problem, and he's rationalized it with germs. He needs to do at least one of three things: 1) learn to give up control, 2) teach the kids how he'd like to have them clean, 3) do the cleaning himself and let the kids have other chores. (Although 3 is likely to illuminate a different area of his giving-up-control problem, I would expect.)