I have two thermometers in my incubator. One came with the incubator it is a little glass one with the red stuff inside of it. The other is a digital thermometer I bought because I thought it would be better. It is a essickair model 1990 digital humidity/tempature monitor. This morning I got up to turn eggs and my digital one was at 99.5 BUT my glass one was reading 102. This is huge! What do I trust and how do I find out which one is right? I'm currently on day 3 of incubating.