I am very new to all this also, and I just started incubating my first eggs yesterday. I tested the unit prior to putting the eggs in several times and it seemed like the temp was a constant 100 equaling 37.7 on the temp screen. With very little fluctuating, but today day 2 ,the temps seem to be fluctuating quite a bit. ( I am in Florida and the temps have dropped from high 70's to 50's but in the house the swing has probably just been about 10 degrees. But I do have this box in the powder room and we have kept the door cracked to reduce the temperature swings. Now the thing is popping up and down and trying to keep it constant but on my meat probe it is rising up to as high as 103 that only lasted maybe 10 - 15 seconds and then dropped to 102, then shortly down to 101. should I be concerned? The meat prob is in the side lower below the eggs and is reading from a different spot of course then the units. Should I turn this unit down a bit? According to the meat prob my temps are fluctuating from 99 - 103