You can pop the wire out to lube the points it makes contact with the plastic even on plate mount without taking the switch out. Just pop one side up at a time, and pull it out. There is just enough play when you torque it to manage it. Be patient when putting it back in place, it can be somewhat irritating. If it's PCB mount with a plate on top, you should have much clearer access to the points where the wire clips into the plastic. Just do one side at a time as well to keep it from coming totally apart and falling inside.
Also plate mount don't (or shouldn't at least) make any contact with the PCB underneath so they really shouldn't have any 'mushy' feeling anyway. It's the little 'shocks' on the bottom of the PCB mount variety that give it the 'mushy' feeling.