How to keep fruit flies out of your airlock

Date January 6, 2005 | Chuck | Beer & Homebrew

A common issue I've seen in homebrew forums is regarding fruit flies getting into the airlock.  Most airlocks have caps with tiny holes to let gas escape but large enough to let fruit flies in (then they drown in the sanitizer)  


I'd prefer they not get in at all so here's my air lock hack:  Simply twist a napkin around the top portion of the cap! 





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