I don't know if its because perhaps the eggs have started to generate some of their own heat or what... but all day today I have had the hardest time maintaining temperature. Only slept for 2 hours (sick 2 year old) and the temp was good when I went to bed. 2 hours later it was 102 

 I adjusted it the same amount I've found to work for these tiny adjustments, opened the lid briefly to let a little excess heat out. Checked again and it was on the money. Then all day long it was bouncing between 98 and then 102. The tiniest adjustment either way was too much 

 Its only day 6 for batch 1 and day 3 for batch 2. Can there really be that much more heat already?