I've recently engaged a housekeeper (yay!) to come clean our condo every other week. We agreed on a rate per job (not per hour) and she owns her own business - she used to clean rooms at a hotel and went on her own a few years ago. She's cleaning my place right now and she's fantastic! I'm about to write her a check and i wasn't sure....20%? Or is this one of those "you do'nt tip someone who sets her own prices" kind of deals?