So today I was trying out a regular-old beat-up NYC Big Muff in a pawn shop today and the sound was pretty rockin'. So I pulled the plug and bought it for 60 bucks, and it's sounding gnarly... But only when the pedal is on. The problem I'm having is when I hit the switch to turn the pedal off, no sound comes out of my amp. I turn it back on, sound coming from pedal, fuzzy goodness, turn it off, still no amp. And only when I partially depress the pedal to turn it off do I ever get to hear my clean tone. I got my buddy to try and clean the switch, to no avail. Should I replace the switch all together or is there another option? A possible important note is that this muff has definitely seen better days and some rockin' gigs because it's pretty scratched up. All suggestions appreciated!