While cleaning up my basement, I found an old Dunlop GCB95 wah pedal that was given to me many years ago. I remembered why it was free when I tried it out... it doesn't wah. - The switch seems to work. When it's on, there's a different noise than off. Almost like it's stuck mid-sweep somewhere. - I was turning the pot inside in both modes and there's no change in sound. When the switch is turned to on, sound doesn't change, no matter the pot position. And this is with the "pedal gear tooth strap" or whatever, disconnected, running the full sweep of the pot by hand. Looking around, most of the fixes in how-to videos seemed to be replacing switches, but the switch is functioning. And I don't want to replace the pot if that's not the issue. Does this sound like something obvious to those who've fixed these before? If so, what should I be doing to fix it? I appreciate any help and advice in advance.