I need help troubleshooting heavy over carbonation of pretty much every batch of my beer (8 or 9 batches). This is driving me crazy!
Here are the details:
-Over carbonation not limited to my all-grain batches, it is in my extract batches as well.
-Fermentation is (seemingly) complete. The FG ranges are within yeast attenuation.
-I ferment 3 weeks in primary and 3 weeks in secondary. Then Cold Crash and bottle.
-Light carbonation in bottles around weeks 2-4, then it reaches a point to where it is so carbonated that it will overflow out the top. I have to open a beer and let it sit for a good 45 minutes to hit the right carbonation level.
-No off tastes to the beer, it tastes just fine.
-I sanitize with a fresh batch of star san every time, and clean my equipment pretty good. (However my fermenter is plastic, possible contamination that is stuck in there?)
-Prime with about 4 oz of priming sugar.
Today I tried opening all my beer to let it sit and recap later to salvage the batch, however I opened two and the foam sprayed me right in the face and got on the damn ceiling and walls!
Any ideas would be great guys. I just brewed up an extract batch of Surly Furious, so I'm desperate to get this carbonation down.