This may not be the case, Rod, but I need to remind everyone reading this to be really careful when cleaning thermo probes. ANY water in the end, where the wire goes in, can cause premature death of your probe. Don't ever submerse the probe in water. You can also seal the end of a new probe with some hi-temp silicone (from the auto parts store). Just wipe down the end of the probe with hot water, but not under running water. The bulb-capillary system inside that probe is very sensitive to water.