Well, that''s not actually bad advice at all. They need to be kept warm, especially in their first week or so when pasty butt usually occurs. If their whole body stays soaking wet, they are likely to get chilled. They don't dry quickly on their own. Those little fuzzy butts, just the butt...
Ah, good old pasty butt -- just to tell you the term usualy used here for this, for search purposes.
It;'s rather stubborn stuff to get off. I prefer to hold them under a stream of gently running warm water. Takes a few minutes, but doesn't hurt them or pull feathers out. After cleaning...