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Re: DIY CO2 and alcohol byproducts

 > If I understand it correctly, the main reason the DIY CO2 systems stop
 > working after a while is because the alcohol concentration in the
 > mixture gets too high, and the yeast starts dying off.
 > Doesn't alcohol evaporate into air?
 > Would it be possible to just uncork the DIY system every week or so,
 > let it evaporate, and then hook it back up? Has anybody done this, and
 > if so, how long does it work before petering out?

For one thing, the alcohol won't evaporate fast enough. For another, the 
alcohol (and CO2) are produced from the sugar in the mix. Eventually 
you'll run out of sugar anyway.