Ok, I am sure this is an easy fix. When I am playing I am getting a slight hiss...nothing crazy, but it is there. When I touch the top of the preamp or the end of my instrument cable, it disappears and everything is crystal clear. Problem is that I can't play while doing the hokey pokey. So I am sure it is a grounding issue...but I have all electrical stuff going through a Furman so it must just be me I guess. What is the easy fix for this?