Sour Humi?

Since the BOTLs have made a move here, I'm posting this up here as well!

I have a humi which I haven't opened in a long time. I opened it up last night and a strong sour smell was present. I wiped down the inside and took out the beads that were sitting in there, but it still smelled. I'm afraid of putting in any sticks because I don't want them to pick up that smell / flavour. It's sitting at home on the counter airing out right now.

Any suggestions on what I can do to bring this humi back to life?





Cheers,
spin