Had a temp spike to 101.9 during the night. Not sure how long that was for. That was on the mid egg level thermometer. Determined the reason was my, (Bert), own fault. Checked the non starter egg last night for any signs of life before turning in for the night. In the process the thermometer which controls the heater slid away from its normal position, which is closer to the heat source. 101.9 is hot but not overly dangerous for a couple of hours. 103 for a few hours is deadly, especially during the first two weeks. We will candle them all on Sat, day 14 and give an update. 101.9 was the max of the spike and the temp doesn't stay very constant with this unit. 101.5 is my guess for an average over a few hours. All we can do is stay the course and monitor. We are really pleased with the air sack development using humidity around 30ish %. Keeping our fingers crossed that we can get all 11 of the fertile eggs to the finish line.