I have a rcom king suro 20 incubator. The humidity on the bator is reading 44%. I also have 2 separate humidity readers which I calibrated. On calibration, 1 read 74% and the other 72%. I have now put both in the incubator and it's confusing me. The one that read 74% is reading 38%, the one that read 72% is reading 43% and the incubator is reading 44%. When I calibrated the 2 extras there was a difference of 2% between them, but since putting them in the bator there is 5%. Can anyone help me please?