Originally Posted by togodoug
as far as I can tell, I sanatize well. If not, why could it be good in bottles for 3 weeks and then go bad. Why would ALL bottles be bad and not just some?
I can't be dead certain why it's good for a week or so and then suddenly around the three week stage it starts to taste bad but that does seem like something that would happen if an infection had taken hold of the batch.
Did you have a few batches between March and this one that ended up tasting fine all the way 'til you finished the last bottles??
The following isn't scientifically supported with any experience or evidence but, I wonder if it could be some form of wild yeast that is capable of high concentration in really warm and humid climates? Just exposure at bottling time being enough for this yeast to contaminate the brew. If so that might
explain why the whole batch is affected and not just a few bottles. Although I'd have thought that the alcohol content of the beer should prevent a wild yeast being able to get hold of the batch.
You don't mill grains in the same place as you bottle your beer by any chance, do you?
Really hope you can get to the root of this problem and start enjoying your beer.