How can she resolve this conflict with a neatnik?

A close friend of mine, 65, is dating a widower, 60. He is good looking, generous, frugal, works like a dog in the yard and his big family adores him. He is also an extreme neatnik. She , however , is a total slob. If he sees a fork in the sink he says, ‘this kitchen is filthy.” She, however, has clean laundry everywhere, hasn’t put up the Xmas tree yet and doesn’t make the beds. She drives him nuts with her lazy habits. What can be done to remedy this before they break up?