A couple of days ago after getting my 67 back into a driveable condition I was at my nephew's until after dark on the way home I noticed no dash lights after repeated twisting of the headlight switch knob I finally got the dash lights to come on but they were very dim to the point nothing is visible on gauges or speedo. Is it possible to clean the switch& improve the lights brightness ? Replace it & have better lighting on the dash? Any one have a possible solution? This issue was in the lights when I first drove the car home when I got it & tried the switch knob to no avail but I had forgotten about it as I've been doing other things to the car.