I've got a pair of Turtle Beach EarForce Z11's that I've been using for a while on both my PC and Xbox. The cable started to fray a while ago so I taped it up. Fast forward to a few weeks ago and the mic output is very low but it is still picking up audio. The headphones themselves still work. I recently re-taped it hoping to fix a lose connection or something but I used duct tape initially so there's a bit of gunk in the wiring. The problem has persisted. Is the problem the wiring and is it something I can fix or are these headphones a lost cause?