The Steamin Demon High-Flow Extractor rated a perfect score in an independent lab assessment conducted by Professional Testing Laboratories in Dalton, Ga., according to H&H Direct Sales.

PTL tested cleaning efficacy of every type of carpet extractor. Each extractor was rated on a scale of 1 to 5, 5 being the highest, based on the amount of soil removed from a test control carpet. According to the results generated by PTL, only two extractors, including the Steamin Demon, rated a 5.