So, I brewed a batch of Sweetwater clone...primary for 21 days and secondary for 7 days. Then it was chilled for 3 days @ 35 in my fridge and has been on 12 psi of gas for 7 days. On day 5 it tasted great and was carbed up nicely... so I had a couple of pints. I thought I would have a pint before mowing and bam, it sucks. carbonation is still the same but it taste extremely astringent. I have kegged several batches by quick carbing and had no problems this is my first "set it and forget it" try and I'm a little frustrated. Carbonic Acid? Any ideas?