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# Leave in contact with surfaces for 5 minutes or more.
# Optional: warm the Star San and water solution to 40°C/104°F.
'''Five Star PBW'''
PBW is a replacement for caustic and is much safer to use and dispose of. It is non-corrosive and safe to use on stainless steel and plastics.
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 3 ounces per gallon of 180°F for 30 minutes.
# For non-circulated cleaning, use 8 ounces per gallon of 180°F water (if using this product on plastics, heat the PBW to as hot as the plastics can withstand), and soak overnight.
# Rinse thoroughly with hot water (cold water may not remove some of the residual chemicals).
==Quality Control==