Fellow Bassists I have got a Fender Jazz Bass (4 string) with a fender 15 watt prectice amp. I have recently purchased a Vox Wahwah pedal, but when I use it i seem to get a hell of a lot of "scratching" noise (when moving pedal). I have checked the contacts on the PCB etc but to no avail. Has anyone got any idea how I can get a clean Wahwah sound out of my pedal? Cheers!