Reply to fader response issue - Vestax TR-1

Hello,

My Vestax TR-1 has just recently started to have issues with one of the volume faders. When ever i reach the top or the bottom of the fader, it jumps back and forth for a moment before it settles down to it's correct position. Not sure if it's an issue with dust/dirt in the contacts, or the fader it self is wearing out. Any suggestions on quick/easy fixes? Or will I need to contact Vestax and see if they can send me a replacement part?