I play through the gt-10b. You know when you want to engage the wah pedal you have to put a decent amount of pressure on the pedal to trigger it. Suddenly mine requires no pressure at all. If you're using the pedal just for volume, as soon as the pedal reaches the max, the wah function turns on. The only thing I could think I did was leave it in the trunk of my car overnight after a gig. But it was 65 degrees that night so I didn't think that was a big deal. Any ideas?