Anothernoisytragedy

About

i have a problem with my vms4, my the volume slider on my 3rd channel recently started acting up, wont go up all the way nor will it go down all the way, and when i put the volume all the way down on my 2nd channel i can still faintly hear it aswell. i am on 2 deck mode, bt yet when i move the 4th channel volume slider, the 3rd channel reacts to it. i am using vdj pro 7.0.5 and the latest drivers for the vms4. is this a problem that can be fixed with deoxIt contact cleaner? or a problem with the vms?, please HEEEELP!