My tach needle gets stuck and sometimes reads incorrectly as a result. Is this due to the tachometer itself malfunctioning or is it a simple matter of dust accumulating over the past 13-14 years? Anybody else experienced this? I'm getting ready to replace my headlight switch and wiring harness so I figured I would clean the cluster while I'm in there. Any suggestions on how to clean the gauges internally? Thanks a million and MERRY CHRISTMAS!!!