I have been struggling with my brewing going on 16 months (all grain). Last year my beers started tasting a bit more muted and not as good (especially low on aroma)…slowly but surely the batches started becoming slightly more phenolic. I PBW’d everything and got rid of any plastic with any slight discoloration. A few more bad batches mixed in with a few ok batches and I finally thought I narrowed it down to my secondary (glass) as I had been tasting it at every step and it was either after the secondary or after carbonation. I was tired of dinking around with figuring out where it was coming from so I got rid of everything post boil with the exception of my bottling bucket (I keg half the time and those were having problems also) and a thief (which I rarely use).
I decided at this point to change my methodology. I kept using dish soap and water to clean everything, but also starting using PBW every single time on everything (before I was doing about every 3rd batch). My next few batches were all okay again (but none were as good as my beers had been in the past) and lo and behold my beers seem muted again (note the few batches that were fine were pretty low on the flavor chart). I tried an IPA in the secondary that a mere two days before tasted and smelled fantastic, absolutely no signs of anything. I kegged it and tried it and the aroma and flavor are muted down and there is a phenolic flavor too.
At this point I am at a loss. PBW isn’t working. Another solution from my LHBS isn’t working (which looks and smells like pbw). I use Starsan for a sterilizer. I guess I am looking for some advice because I don’t want to get rid of everything yet again knowing that may not actually solve the problem. my main questions are:
1. Can anything preboil be causing this? Wouldn’t the boil take care of it?
2. How come in several of the batches I can detect absolutely no problems between the primary and secondary, the secondary and the bottling/kegging, but then boom, there it is? Is this common with this contamination that it is tough to detect it without the carbonation? Out of all of these batches only once was something visibly wrong. and that was when I got rid of everything.
I know that too much sparging (I fly sparge) and overcrushing can cause phenolic characters. My crush looks good, some flour, some shells, some grain chunks…and I checked it with a feeler gauge and it is still at the factory setting. I guess it could be my sparge but there has been quite a bit of variation in the amounts of water I have used and pulled off without a change in that nastiness. If it was the sparge or crush wouldn’t I detect it somewhere before bottling? I am praying that someone out there can give me a small glimmer of hope…
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