My volume knob came off a while ago and I didn't really care until now. But now it's started making a terrible crackling noise because it's loose. I can't figure out how to get it to stay on tight. There's a tiny screw, but it serves no purpose. I know because the tone knob has a screw but I've taken it off and the knob is still secure. Any ideas?
Try put some duct tape on the potentiometer and then gently push the knob back in.