OptoStomp farting on me

[*insertcoolname]

Today I turned on my trusty optostomp and it gave me a pretty bad problem. Every time I would hit a note hard it would distort in a really bad sounding manner that made slapping pretty much impossible. This has never happened to me before and I was wondering if this has happened to anyone else? Possible solutions? Thanks for the help in advance.

[bongomania]

How are you powering it?

[*insertcoolname]

Daisy chain. Running a one-spot. Also, if it means anything I keep a battery in it, even though the battery is dead.

[bongomania]

I'd say try pulling out the dead battery (not that it should matter, but you never know), and try powering it with either a different wall wart, or a fresh battery, and see if that fixes it.