hey all, my left side speakers weren't working; got a distorted muffled sound from them, front and back, left side only. but they ALL work fine when the radio is on. took out all the cd's and tried them at home.. they work fine. so now the only thing left is the cd itself. can i just use any CD "cleaner" to hopefully fix this problem? thx in advance. (i have the stock 2K2 bose system)