I am looking for some help from some incubator experts! My farmers digital 4250 has a digital gauge that can be set, unfortunately my 2 thermometers on the inside are reading low temps. ( one is a mercury therm and the other is a tiny digital temp one) When set the outside digital temp read 99.0 inside 97.0 and 96. When I set the outside gauge to 102.5 it reads 99.9 and 99 on the inside. Which would be better to follow the manufacturer, or the two congruent temps which are prob right?