Hi there! So my son bought a brand new Vox V845 wah pedal a year ago. When pressing the toe end down it is very scrathy. Should I take it apart and use deoxit or what else does anyone think I should do? Is it a potentiometer issue? Just looking for some advice before I get into it. Thanks! Keep on pickin!!! P.s. If I need to use deoxit, what type should I buy for pots,pedals and movable electronic guitar parts?