For the last two weeks or so I've been using Masterblend SoapFree as a Pre-spray(w oxy+) and rinse combo. So far I've been really surprised at the results! It needs a decent dwell, 10-15 min, and it cleans great with my semi-high-heat Salsa CDS. Obviously I don't expect this stuff to clean Sec 8's, which is why I still keep P-Burst on the chem shelf. Other than little black spots, this combo rocks...