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Old 01-13-2012, 03:38 PM   #1
brewtime's Avatar
Apr 2009
sykesville md
Posts: 351
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For the life of me can't get this black stuff off the neck of the carboy. I have soaked it with PBW and most recently with Oxyclean. Nothing I do gets rid of it. Anyone have any ideas or am I a proud owner of a new coin jar.

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Old 01-13-2012, 03:41 PM   #2
Waste Allocation Load Lifter - Earth Class
passedpawn's Avatar
Apr 2009
☼ Clearwater, FL ☼
Posts: 26,649
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It's probably lead or some soft metal from the arm of a carboy cleaner brush. I wouldn't worry about it. You would probably need to physically rub it off.
- Andrew

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Old 01-13-2012, 04:43 PM   #3
Dec 2011
Saskatoon, SK
Posts: 62
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To me it looks like the glass was scarred/scratched... If a concentrated overnight soak of hot oxyclean doesn't remove it - I'd be surprised if it is a deposit at all. My bet is damaged glass. I wouldn't worry about it too much until it starts affecting your beer!

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Old 01-13-2012, 05:50 PM   #4
Apr 2009
middle of nowhere
Posts: 1,910
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I agree with the carboy brush. The handle is rubbing the neck and leaving marks/metal deposits. It's totally ruined unless you have a finger to clean it off.
............Alright Brain, you don't like me, and I don't like you. But lets just do this, and I can get back to killing you with beer......~Homer

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