I have a Dunlop Crybabay 535Q Wah pedal, and when i press it down to just before it hits the switch, the sound completely cuts out on me, and sometimes stays cut out or it comes back in, its not the battery because ive used multiple batteries and a 9v adaptor, being as im only in my 2nd semester of Electrical Engineering major, im still not good with troubleshooting and such... can anyone help me find out what the issue is? and how to fix it?