I have a Kodak process thermometer that I have trusted for many years that now seems to be at least 8 degrees off from my other thermometers. Can that happen? and if so how? I developed some film last night and it was telling me that the water from the tap was well below what the thermometer on the water panel was telling me. At first I started to adjust to conform to what the Kodak thermometer was giving me and then I realized that I never have water from the tap below 70F this time of year. Something had to be wrong, I checked the water with two other thermometers that I trust and they agreed with the water panel. The developed film looks right on so that seems to be confirmed. Am I crazy? This thermometer could not have been off that much all these years, so what happens to them?