S.J.
Continue to model it for her- and make it seem like a big-girl thing to do. Don't baby it down at all. Show her that this is what big kids do to protect themselves from germs. If you want to talk about germs you can put vegetable oil on her hands, and then sprinkle cinnamon- calling the cinnamon the germs. When she washes her hands with just water the "germs" stay, but when she uses soap, they will come off.