removing dry chicks from the incubator
That's always a judgment call. They can be safely left in the incubator for at least 24 hours. But if they are running around flipping the unhatched eggs I sometimes try to get the first ones out if they are dry. On the other hand if opening the incubator will cause the humidity to plummet and the pipped eggs to shrink wrap I may try to wait.
I try to take into consideration the state of the remaining eggs before acting.