How do you sanitize and prepare a bung for stopping a carboy? While making sure that it will maintain a good seal and not POP off sometime later.

In depth
I removed and sterilized my bung and airlock (from a 170 day batch of JAOM) last night (due to a fruit fly infestation of the lock: Q: Fruit Flies in Airlock).

I had a difficult time replacing the bung after sterilizing it with Star San sanitize. My right brain wanted to dry the bung and bung hole with a paper towel while my left brain believed this would lead to possible contamination.

I eventually air-dried the bung in my hand, fearful of contaminating it if I let it rest anywhere. After a few attempts the bung appeared to fit into place. I affixed the airlock and cleaned up. I went to bed 90 minutes later, all appeared fine. However, when I woke this morning I noticed the bung and airlock POPPED off!

This time I just placed the bung into the hole and topped off my airlock. I cannot help but feel that I do not know what I am doing, that I have bought an inferior bung, or that my mead is now on a dooms day count down.

1 Answer 1


Paper towels right off the roll are sanitary, so you could have dried things with them. I have done that many times without a problem. I have also used duct tape to hold the stopper in the carboy.

  • I've also used zip ties. You can also buy a carboy cap instead.
    – kenyabob
    Commented May 14, 2013 at 19:37

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.