I started out at 84F, but then turned it down a degree every time I read a post about kinking or domed heads or non-feeding babies. So right now the incubator is about 80F. The first baby came out on day 66. I feel like reweighing her, seeing as everyone is bigger today! I've probably had it at 80F for the last month. I feel like these are pretty nice-sized hatchlings. I've bought plenty of hatchlings that weighed several grams less, that had been fed a number of times.