iirc, the way the article described it is that he turns the water on briefly to get wet, then turns it off while he scrubs up. Then he rinses off. So it running water for 90 seconds, but the "shower" takes five minutes or so. fwiw That makes more sense. Bottom line, if you're leaving soap on any part of your skin for less than 15-20 seconds it's not doing horsefeathers, and shampoo and whatnot really should be in your hair a good 2 minutes for it to actually do anything besides just making it smell better. only mojo would be dropping horsefeathering soap science on people