I turned my eggs and shut the bator this morning. Then I go back about 20 minutes later to check the temps. and the thermometer is distorted or something... There is a 1/4 of an inch of the red mercury showing at 101 and then it is clear for 20 degrees and the second line of mercury is at 79. So, there is a big gap in the mercury. Why is this and is the top part still reading correctly? I have very precious eggs in here right now and I am about to have a heart attack!