Good lord I didn't think this would result in so much "you have no proof!" commentary.
Look, if I was prosecuting Star-San, I wouldn't get a guilty verdict in criminal court against the "beyond a reasonable doubt" standard. I probably couldn't even get a civil judgment with a "preponderance of the evidence."
We're talking about the growth of microscopic cells here. I don't care if the CDC set up shop in my house, we'll never really KNOW what did it. I was just pointing out that the oft-repeated concept of judging sanitizer effectiveness by visual appearance alone may be an oversimplification.
I bought some acid test strips to check it out in the future. If I had already had them and knew the pH of the stuff beforehand, don't you think I would have mentioned that? I blame the star san (more appropriately, my use of it) based on Occam's razor: the simplest explanation should be tested first. It was the only commonality between the 3 batches, other than the obvious stuff like kettle, primary fermenter, etc. Could it have been a cleaning issue? Absolutely. Do I find that less likely since my cleaning procedures (Oxyclean soak, scrub, rinse, dry) have remained unchanged from batch to batch? Yep. Do I wish I had kept the old sanitizer and tested its pH for research purposes? I sure do.
If my next batch turns out fine I'm gonna declare it absolute proof that it was the star San, just to get under some of y'all's skin
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