The thermometer with the probe I was using did not have decimal places. Most of the time it read 99, occasionally 100. But I also had a couple of drops down to 96 too. Added more sealed containers of water, for thermal mass, the first time. The next time was hatch day. So I will be checking it before trying to do another hatch. Also will be getting a better probe thermometer. I will have to look into that...but I kind of like paying less that $15/mo for internet, even if it is slower that molasses.