I've opened it up and I've cleaned the circuit board spot for up, and the rubber pad end with isopropyl alcohol. I'm not sure what else to try. I believe I've heard of people reapplying graphite or something to the part on the rubber pads, but I don't know what I would do that with. Everything else on it works perfectly, it's just the up button that does nothing. Any thoughts or suggestions would be greatly appreciated.

