Originally Posted by JoshuaWhite5522
so I've been brewing for 5 months now and I thought I had everything down, but lately my last few batches have become sour after bottling(They taste great up until that point). As far as I know there isn't anything I've changed except for the fact that I'm washing everything with PBW before I sanitize. Now I rinse after using PBW so I don't think it's the problem but maybe I'm not rinsing enough. Any ideas what the solution could be?
Have you brewed anything lately using Brett? Lambic, perhaps? If so, you may have some bugs in your system somewhere. Even if you haven't used any Brett cultures, you could still have some unwanted bacteria in your tubing or buckets or whatever.
I would change out tubing, wash all valves or spigots and give everything else a good long soak in Star-San.