and all i can think is, what did i do wrong??

I know the medium was a bit dry right in the beginning, but I did add water and they seemed okay.

Im wondering, did I possibly take them out too much? This would cause fluctuation of temperatures if taken out too much - The temps were steady inside the incubator.

I cut the 2 open to look, it seems like they both died around the same time, maybe a week ago.
I am at day 51, btw. I guess this is all part of the learning process, but boy am I crushed, and boy do I feel really ***** right now. Please, help me figure this out.