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Old 01-25-2009, 03:52 PM   #1
mattmcl
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Someone gave me a 7 gallon carboy, and it's got some dried stains in it, like liquid dripped down the inside and dried there. For the life of me I can't get it clean. Here is what I tried:

Soak for four days with bleach at .25 cup per gallon- no change.

Soak for four days with Star San at 1 oz. per 5 gallons- slight improvement, and the Star San got really cloudy.

Soak for two days with Oxiclean at 1 scoop per gallon- slight improvement.

(I rinsed very well between steps too).

Any ideas? The cloudy Star San leads me to think it's mineral deposits of some kind, but I'm not sure. The carboy has definitely been used to brew as it has gallon markings and a fermometer, but I have no idea what was in it previously.



 
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Old 01-25-2009, 03:56 PM   #2
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Unless you are certain that the bucket was properly taken care of and cleaned by the previous owner, then I would be hesitant to use it. Small scratches from cleaning it will harbor nasties, thus making bad beer. If you're sure you have a good bucket, I'd say you're good to go after you rinse it a few more times to get ALL the bleach out. Stain or not.

You could use a sponge with hot water and dish detergent.(the handwashing kind)



 
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Old 01-25-2009, 04:41 PM   #3
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I had the same thing with some I got used. I used an acid rinse I had and it removed it. your starsan is an acid too. If your in no hurry I'd just keep letting the starsan sit in it until it comes clean.

 
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Old 01-25-2009, 04:44 PM   #4
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You could always up the starsan dosage to make it more acidic. maybe 2oz/5gal then after the soak, add another 5 gallons so its back to norman no rinse sanitizer concentration.
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Old 01-25-2009, 06:29 PM   #5
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Quote:
Unless you are certain that the bucket was properly taken care of and cleaned by the previous owner, then I would be hesitant to use it.
I should have mentioned it's glass.

 
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Old 01-25-2009, 06:32 PM   #6
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Caustic soda !
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Old 01-25-2009, 06:50 PM   #7
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PBW will take care of just about any stains or buildup. Bleach and starsan aren't cleaners, so they shouldn't really do much of anything. Yeah, the acid blend will take a little bit off, but you really need something like PBW. A 2 or 3-day soak with some scrubbing via a carboy brush and it'll be like new. I mean, damn, it's glass...you've gotta try really hard to actually "stain" glass.
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Old 01-25-2009, 07:09 PM   #8
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Quote:
you've gotta try really hard to actually "stain" glass
Yeah, that's what I thought! I've scrubbed too, and I just can't get enough leverage. Isn't PBW an oxygen cleaner, like Oxiclean?

 
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Old 01-25-2009, 07:24 PM   #9
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Quote:
Originally Posted by mattmcl View Post
Yeah, that's what I thought! I've scrubbed too, and I just can't get enough leverage. Isn't PBW an oxygen cleaner, like Oxiclean?
Yes it is. It works best on organic soilage. You are probably correct in thinking it is mineral deposits as that is what Star San will "clean" and that is what makes it cloudy. I'd try using more of it as suggested earlier.

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Old 01-25-2009, 07:30 PM   #10
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PBW is an alkali cleaner, not the same as oxyclean. I don't know where this information came from, but it seems like a lot of people think that they're the same thing. I've had some nasty stuff that oxyclean wasn't doing much to, but PBW took care of it.


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MOSS HOLLOW BREWING CO.
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.planned:
•Scottish 80/- •Sweet Stout •Roggenbier
.primary | bright:
98: Moss Hollow Soured '09 72: Oude Kriek 99: B-Weisse 102: Brett'd BDSA 104: Feat of Strength Helles Bock 105: Merkin Brown
.on tap | kegged:
XX: Moss Hollow Springs Sparkling Water 95: Gott Mit Uns German Pils 91b: Brown Willie's Oaked Abbey Ale 103: Merkin Stout
98: Yorkshire Special 100: Maple Porter 89: Cidre Saison 101: Steffiweizen '09 (#3)

 
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