I am thoroughly confused on the difference between how to measure wet bulb or dry bulb humidity . My incubator has a built in humidity gauge , is that the wet or dry bulb? I know you should know both but I have no idea what the difference is or how to measure it. I have a combination thermometer barometer I bought in the incubator and the barometer reads different from the built in one of the incubator. It reads the humidity lower. How do I know which is right? I have looked this up on the internet but everyone gives such a complicated technical description that I just don't under stand it. Can anyone simply explain it to me.