I've recently added more highs to the tone of my Cirrus 4 - on-board and at amp. I like the tighter sound, but the finger noise has increased quite a bit, even when I'm properly muting the strings. I realize most of this extraneous sound will be inaudible on a gig, but it's distracting when practicing alone in a low-noise environment. Years ago, I saw a guitarist apply a spray to the strings of his electric to reduce such noise caused by finger movement. Any suggestions on such a product?