I don’t have an issue with boil over; my kettle has a 15 gallon capacity. My issue is in the fermenter. I have a 6.5 gallon fermenter so my head space is limited on a five gallon batch. I don’t always blow out, but when I do, the cleanup sucks!
So, I gather, the product works, but we don’t know when it will expire, a couple drops is all that’s needed, it can be used in the starter wort and it should be kept refrigerated.
Great info! Thanks!