Okay, so I've been preheating my incubator to the right temperature. I have two of the same thermostats in there. One is sitting on the grill mesh at the bottom of the incubator, and one is on a metal stand which is at the level of the top of the egg. I have a still air incubator with an automatic turner. The top thermostat reads about 103 degree Fahrenheit, but the bottom thermostat reads just under 99 degree Fahrenheit. Should I lower the temp or leave it? Any advice would be appreciated.