I'm using a Brower 845 still air incubator. The instructions tell me to keep the thermometer between 101-102 degrees. My digital thermometer wasn't very acurate so I placed a (reptile) thermometer with probe across the egg tops. The probe shows very precise temperature variations to the tenth degree. BTW-My digital thermometer/hygrometer stays at about 95 because it is seemingly measuring the floor temp only (and I question it's accuracy at that). I did check the hygrometer with the salt test and found it within 2% of the correct 75% reading. It was 77% so I'm comfortable with the humidity readings it's giving me. My heater cycles (turns on) about every 5 minutes and stays on about a minute. The probe readings change about every 10 seconds and climb to a peak and then fall to a low within that 5 minute cycle. I've been taking the "average" of those two "extreme" temperatures to regulate my incubator temperature. Am I figuring this correctly? Example: High-103.5/Low-99.5 = 101.5 High-101.5/Low-96.2 = 98.6 High-104.2/Low-99.4 = 101.8 High temperatures over 104 scare me, so I often find myself regulating the screw to a lower temperature...but maybe 104 is OK because it is only part of the average temperature and NOT the stable temperature?? This is my first hatch experience and I have 11 special silkie eggs in there (special to me anyway). I'm hoping someone can either calm my fears or correct me on understanding these temperatures.