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How long will it last in the open

Black Russian

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Joined
May 17, 2025
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I made vinegar successfully. What I wasn't sure about was is if it had finished converting from alcohol.
Left it in the garage with muslin over the jars, forgot about it, came back a bit over a month to find it no longer smelled good.
Anyone know how long is too long?
Does temperature have an impact on the length of time.
 
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