Hello, first let me start by saying we appreciate this forum all the time! Our backyard flock is happy and healthy and a lot of thanks to our answered questions here. We’ve recently tried to incubate and hatch 7 eggs, on two separate occasions. I Wanted my 4 year to see the process as she loves our Ladies SO MUCH. Both times, neither hatched, we are devestated! The first time my thermometer was off by 4degrees (stupid mistake) and our humidity was too high early on, this is when I started extensive reasesrch as for it not to happen again. We used a little giant still air incubator. With 2 calibrated thermometers at top of egg level. A hydrometer, between 30-40 the first 18 days then increases to 65-75 at lock down. Temperature was consistently 101F, if it fluctuated at all it was by half a degree. Automatic egg turner, clean hands, distilled water. Checked air cells day 7 and 14, had chicken growth and movement up until lock down. None even internally pipped, what could have gone wrong?