wow... that was a lotta reading.
I know how frustrating it can be. I almost quit brewing about a year and a half ago because I was getting an off-flavor on my new rig that I couldn't find (and I still get a ton of crap about it from my dear "friends"!!!) It is insanely frustrating though.
I dunno... my two cents is on the only thing I haven't seen anyone mention (maybe I missed it) is your kegs. Are you occasionally completely breaking down your kegs (removing dip-tubes, removed o-rings, etc) and giving them a good cleaning... and THEN a good SANITIZING? (cleaning and sanitizing aren't the same thing). It is really easy to get a bug in a keg and I think a basic infection will toss off all sorts of off-flavors.
I think your current hefe might be a good test case... if it tastes ok now... give it another couple weeks and see if it still tastes ok. If it does... it's probably not a keg issue. If it doesn't... then you may have found your culprit.
Good luck though... trust me, once you find it, it's going to be awesome to brew again.
Why the eff not... everyone else is starting a nano!!! I wanna!!! www.bogironbrewing.com
Originally Posted by paulthenurse
I'm pretty much a douche in real life, too.