Henry, contact David Clark about the problem and I bet they will repair your headset abd recondition them for free or a very reasonable cost.
I know people that have brought headsets in to them, went to lunch and came back and picked up their reconditioned headsets.
DC is a great company and stands behind their products.
Ron, I have done that two times and had similar results (Free repair and reconditioning). But I believe they only do that for walk-ins as a courtesy for making the effort to visit the factory/office in Worcester, MA.