i would say you are done, but of course that is up to you. feels bad to throw them out. i am at day 23 and am taking down the bator when i get home from church...it smells.
when i was adding some water yesterday to my 5 unhatched, my toddler dropped something in to the aquarium and it broke two eggs, so i got a chance to see what was up with them. one was infertile (it was a first egg from a pullet, and would have made barred olive eggers, so i hatched it just for the heck of it as she laid fro the first time on the day i set eggs). the other was fully developed and looked great, but had not pipped internally at all into the air space, and was dead.
the three i have left i will likely open the tops on later, just to see whether they internally pipped or what. those cold temps on thursday night, in my opinion, got them. we'll see with the forensics investigation whether my hunch might be correct.
so i set 12 eggs, threw one out that died around day 11, and went into lockdown with 11. i figured the blue never developed but couldn't see well enough to be sure, so kept it since it did not smell. so, 10 that were definitely alive at lockdown, and i hatched 6. not bad, but last hatch was way better. 31 went into lockdown, and 25 hatched.