ASK WHEEBZ -
I have two five gallon kegs that I'd like to use for batches this weekend, that were used as fermenters previously, and have stubborn (organic) spots at the krausen height on the sides that I'm having trouble cleaning with a brush and PBW ...
I think Barkeeper's Friend would be a reasonable next step, but I'm lazy, and I have 96%+ sodium hydroxide microcrystals from my old soapmaking days, and also have potassium hydroxide as a matter or fact ...
My understanding is that would alleviate mechanically cleaning it, but 1) I'm not sure what strength I'd use in the form of oz lye/gallon water, and 2) I'm not sure how to dispose of it (although down Danielle's drain is an appealing choice) ...
Do you know off hand the strength I'd want? ... I think I'm comfortable with dumping it down the drain for #2 ...
I'm thinking about brewing 4x batches over the end of the week and holiday weekend, but I'll need access to all three of my 5 gal corny's and the glass carboy to hold them all for ferm ...
Thanks.