Performance Indicator Gauge

I had just stated in a recent thread that I have never seen a failed performance indicator. As of this morning that is no longer true. How contamination got there is a interesting question. Vaporizing fuel deteriorating the rubber tube at engine off maybe? Small crack/hole in the brass actuator coil? Who knows?

MINE DOESN`T WORK EITHER, HAVE BEEN LOOKING FOR SOMETHING TO COVER IT UP WITH , THAT DOESN`T INVOVLVE REMOVING THE DASH AGAIN . hope to be done w/ that .