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Tips for using PBW on equipment that may have had biofilm formation <ref>[http://www.fivestarchemicals.com/wp-content/uploads/PBWTech.pdf "PBW Tech Sheet". Five Star Chemicals. Retrieved 04/19/2018.]</ref>:
# For circulated cleaning, use 1 to 3 ounces per gallon of depending on the soil load, and heat to 180°F . Recirculate for 30 minutes (if using this product on plastics, heat the water that is mixed with the PBW to be as hot as the manufacturer of the plastics recommends, and extend the circulation time to an hour or two).
# For non-circulated cleaning, use 8 ounces per gallon of 180°F water (if using this product on plastics, heat the water that is mixed with the PBW to be as hot as the manufacturer of the plastics recommends), and soak overnight.
# Rinse thoroughly with hot water (cold water may not remove some of the residual chemicals).