Hi Tony!
The probes on the Maverick, like every other bulb-capillary probe, are sensitive to water. I am very careful with my probes, and never submerse them in water! I use a hot water rinse (me holding the end of the probe under hot water), and a ScotchBrite pad to get it clean. It's good to put some hi-heat RTV sealant on the end of the probe, where the wire goes in.