I had this problem with the probes on my Nu-Temp. A good way to stop the moisture problem is to get a piece of high-heat shrink wrap and put it on the probe where the wire goes into the probe. Only needs to be about 1" long to cover the joint. You can get the high-heat shrink wrap at Radio Shack or Home Depot ( it's in the elec. dept..it's black and about 6" long tubes) and comes in different diameters . I did this and have not had another problem and the probes are 3 years old now.