The headset / phone switch in my ancient HelloDirect phone headset became increasingly intermittent and finally stopped switching at all, so I tore the thing apart. It has two snap latches on each side in addition to the single screw in the bottom:
The 4PDT switch just to this side of the volume drum can’t be taken off the board without unsoldering all 12 terminals and two case anchors, so I just eased some DeOxit Red into the openings and vigorously exercised it. That seems to have done the trick.
I cleaned out a bunch of fuzz and a spider husk while the hood was up…
The Smell of Molten Projects in the Morning 