I am sorry.. I know how hard it can be *hugs*
if any of the remaining eggs look developed, by all means keep them in - chicks can hatch late... was humidity high?
I have had good luck with the dry incubation method.. it is practically the opposite of the instructions that came with my...
wow, 52 eggs is quite a few!
if you have NO external pips, you can safely open the incubator. the danger is when an external pip has been made, opening the membrane up to the air. if the humidity drops, the membrane will dry up and harden. when you have no external pips, no eggs are open to the...