Extract beers don't last?
I was wondering if anyone else has experienced this. I have an amber ale a brewed back in the beginning of September. It was tasting fine the past few weeks after bottle conditioning but there is a chemical like taste starting to develop in the bottles. I have had this same flavor happen with all of my extract brews. If I brew all grain that flavor does not show up. I was wondering if this is a common thing or if there is something I can do to "prolong" the shelf life of my beer.
Quick primer on my extract process:
-I use RO water that I add brew salts to that are supplied by my LHBS. hey have them pre mixed and packaged.
-I do full boils and do not top off
-The most recent recipe had three additions of cascade hops. A 1.5 oz 60 minute addition, a 1 oz 15 minute addition, and a .5 oz flame out addition.
-My fermentation is temp controlled and I made it a point to ferment this beer at 67F
-I sanitize everything that comes into contact with my beer post boil using star san at proper dilutions
-All of my extract batches use steeping grains, these were steeping at 155-160 then drained.
I think that should cover the major parts of my process just in case anyone thought it could be bad practices.
Any help is appreciated guys!
Always do drunk what you said you would do sober.