I'm looking for a better solution for cleaning. Some of my equipment is home from copper which limits agents I can use. Currently my strategy is using barkeepers friend on all external surfaces such as my sparge arm and mash tun internals, and of course the inside of the kettles. Once everything is visibly clean I make a 5 gallon mixture of starsan, and circulate it through all my equipment. For the most part this works on everything except my chiller. I can't really clean the internals of my sparge arm and mash tun filter system but I don't have too much trouble with these and don't worry too much since its before the boil.
I use home made reverse flow tube in tube chiller. Scrubbing surfaces is not an option. Neither is not using it, because it works really well. The problem is that cleaning is difficult. Right now, all I do is a hot star san flush. Can someone recommend a good aqueous cleaning solution that is cheap and copper safe?
I found some solutions here cleaning copper but I don't think they will work in this situation.
Has anyone used NaOH in very small tinctures? Instinct says this is a very bad idea, but I happen to have a lot of pure NaOH (long story) and I don't do much with it these days.