Quadruple triple double hint - I just posted to another thread, in which I have posted about this beer before and just posted about it again. Work on your Sherlocking skills, y'all.
For example, here's how I solved the last one: his signature included his Untappd username. On Untappd, he had quite helpfully posted every beer he's brewed, which included a saison with two unusual adjuncts. It wasn't a huge leap to realize that it was the beer he had posted, most likely with the assumption that it would take a while for someone to guess cucumber and jalapeno. And that is not the only technique I've used to bust this game wide open; you'll see from my history that deductive reasoning helps as well. But still, a little research technique (I learned that from my librarian wife, God bless her) combined with common sense goes a long way not only in the game, but in life as well.
Maybe that's why I like this game so much. Combines beer with library research skills and deductive reasoning. Anyway, someone put this one to bed so I can get on with playing instead of waiting!