I also admit that I never use the PP or WW when provided. I think most wrinkles are set by leaving the clothes in the washer for a prolonged period of time after it has finnished its cycle. However, I almost always use a cold rinse. I have read that if the cold rinse water temperature falls too low, then the rinse is not as effective as a warm water rinse, but I have had no problem rinsing out the Fab detergent I currently use. I do remember (during a "back to nature" phase of my life) that one had to use a warm rinse to effectivly remove laundry SOAP from clothes. I was using "Ivory Snow" and it left a "high water" ring around the tub and agitator even WITH a warm rinse. Some of those old machines had hot spray rinses, such as Robert's Wizard because of the need to rinse away soap scum.