Wait at least till day 22 or 24 hours after pip minimum to even think about getting close to the bator. All too often people want to help but end up losing the one they are helping and further compromising the rest of the hatch by opening the bator. If temps ran low, they could take up to 2-3 days post due to make it out. It is not unusual for some birds to take 48 hours after pip to make it out, and not unusual for there to be some speedy zippers pipped and out in 6 or less. You're at the hardest time in the incubation process to just sit back and try to wait it out. If you do deem that intervention is required, such as the the cheeps are getting more quiet, time is running really late and the membranes are too dry because the humidity was let out/not up enough, then there is a sticky under the reference in this section about assisted hatching. Good luck!
