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====Efficacy of Cleaning Agents====
Sodium hydroxide (caustic), [https://en.wikipedia.org/wiki/Ethylenediaminetetraacetic_acid EDTA (ethylene diaminetetra-acetic acid)], chlorinated disinfectants, and hydrogen peroxide-based disinfectants such as Pur-Ox from Birko or Lerasept-O from Loeffler are effective at breaking up biofilms when used in their highest recommended concentrations <ref name="Wirtanen_2001" /><ref>Brandon Jones. Private correspondence with Dan Pixley. 04/02/2018.</ref><ref>[https://www.reddit.com/r/TheBrewery/comments/6hqnvf/mtkettle_cleaning/dj0zd0s/ Levader on Reddit.com. "The Brewery". Retrieved 04/02/2018.]</ref>. Peracetic acid (PAA) has also been shown to be effective against biofilms in the highest recommended concentrations but isn't as effective as the previously mentioned cleaners and should be used after a caustic cleaning cycle <ref>[https://www.researchgate.net/publication/273439407_Disinfectant_testing_against_brewery-related_biofilms Disinfectant testing against brewery-related biofilms. Storgårds, Erna & Närhi, Mikko & Wirtanen, Gun. 2001.]</ref><ref>[https://www.researchgate.net/publication/244994186_COMMERCIAL_SANITIZERS_EFFICACY_-_A_WINERY_TRIAL COMMERCIAL SANITIZERS EFFICACY – A WINERY TRIAL.
Duarte, Filomena & López, Alberto & Alemão, Filomena & Santos, Rodrigo & Canas, Sara. 2011.]</ref>, but its effectiveness decreases below 20°C. Chlorine and iodine-based disinfectants destroy microbe at colder temperatures, however, they are less effective in the presence of wort or other residues. Chlorine-based disinfectants can cause pitting in stainless steel if left in contact for too long, and [https://ssbrewtech.zendesk.com/hc/en-us/articles/205602399-DO-NOT-USE-BLEACH-OR-CHLORINATED-CHEMICALS- some stainless steel manufacturers] recommend not using chlorine-based disinfectants at all (refer to your equipment and chemical manufacturers). Hot water is one of the most effective disinfectants, however, dry heat is not effective at killing bacteria (one strain of ''L. brevis'' was able to withstand 80°C dry heat for 60 minutes) <ref name="Wirtanen_2001" />.
==Quality Control==