blackmoreguitar
Experienced
Have you checked if the wah has come on when when the sound 'gets crappy', as Cliff suggested? I have an AXE II and and an AX8, and one of the very few things that I don't like about both units is that the wah seems to sometimes switch itself on. I never have understood why, but this could explain your issue. Because of this I do not use the wah block anymore and if I need a Wah I use my EVH wah in front of the AX8.