We just made apfelwein in a really old 13 gallon carboy that had been sitting in my grandparents basement for probably 40 years or so. It was really dirty when I got it and I thought I did a pretty good job cleaning it with oxiclean and some gentle scrubbing. There were still some semi-dirty spots on the bottom (looked like a calcium deposit or something) but we decided to fill 'er up with apfelwein fixing anyways. My question is two fold--do you think that this may end up ruining the batch and is there a way to clean this off? I have soaked in oxiclean twice and and scrubbed it twice as well. Thanks!
On Tap: Heavenly Scourge Black IPA and Beecave Heffe
Next: Thunderstruck Pumpkin Ale and Pliny the Elder Clone