I am using the IncuView incubator which comes with a thermometer. I am also using a digital thermometer/hydrometer. I calibrated both and they were within one degree of each other. Both probes are positioned next to each other at the same location vertically. I noticed over the past two days that the Incuview's thermometer will read 99.6 and my other thermometer will read 103! Big difference! I recalibrated and they are still reading the same. Which do I trust?