I don't bottle much but I recently enetered the county fair (did pretty good too- 2nd and two 3rd place entries
). During that session I bottled all of my beers after sanitizingin oxiclean then spraying them down with starsan.
I used the same solution for everything and let the bottles soak in Oxiclean over night, rinsed and starsan. Then to a borrowed bottling tree to dry while bottling. I put a few Grolsch style bottles back for myself and recently shared one with a new brewer I met. I was horrified to taste green apple out of the bottle. I didn't detect any gasget leaks, there was a nice pop when I opened the bottle and the rest of the bottles that I capped with normal bottle caps turned out fine. Also the we kicked the keg on this particular IPA and it was fantastic to the last drop. The botlles are less than a month old.
What would cause off flavors in a single bottle that was cleaned and sanitized using the same liquids and bottling wand as the rest of my bottles that turned out fine?
For now I am just pitching that bottle to be safe but it would be nice to avoid in the future though.