In most, not all, of my extract brews I've noticed a fairly unpleasant (not horrible by any means) after-taste. It's always right at the back of my tongue and hard to describe: maybe metallic. A lot of times, I think it's coming from the foam/head of the beer and I can pick it up distinctly if I take a mouthful only foam. It might be due to any of the following, but I'd love to know exactly which one so I can eliminate it:
- partial boil
- quality of my water
- not sitting in the fridge long enough before tasting
- the infamous extract twang
- fermenting at a an ambient temp of around 68
I am obviously working on adjusting all of the above mentioned, but just wondered if anyone knew more precisely what it is I'm tasting. I realize it it be hard to guess without knowing full recipes and procedure, but thanks for any ideas in advance nonetheless!