hi everybody ... I'm planning to setup an incubator that I got from a friend, the incubator model is JN5-60. I also have a thermometer for showing the humidity ( it also shows the temperature). from what I have been reading, I'm supposed to set the temperature to 37.5 C for the first 18 days but when I turn the incubator on and set the temperature to 37.5 my other thermometer shows 4 C higher (42) and I have to set the temperature to 34 for my thermometer to shows the temperature 37.5-38 my question is which thermometer I can trust ? (incubator thermometer or my other thermometer) thank you.