WilliamsWarn Brewery Detergent is a strong cleaning agent that will dissolve brewing residues off your equipment. These remnants of the brewing process must be removed, so that in a following sterilisation step, sterilant can have a good contact with the cleaned surfaces and destroy unseen and undesirable micro-organisms. The Brewery Detergent comes with the Gen2 Brewery, as part of the sundry equipment set. However, over time you will need to purchase more as you use it. The detergent will last about 50 brews.