If I could find some, we don't have a RS nearby, not that they would have any anyway. I blew come canned air into it (around the knob). It will work for now, I should take it apart and try the air again, but I just wanted to listen.
Yaesu CPU2500R, 2x Bearcat III, old PRO-46, and a new PRO-136. DX-399
Grid Square DN90WW