Yes everything what the above posted said. If you haven’t candled yet and no one has pipped I would do it, make sure after you do it and toss the bad eggs that the humidity goes back up to proper levels you want it higher for hatching some people say 60, some say 75 some day 85%, so I mean you gotta decide what you are gonna go with.
Keep the temp at 99.5 or at least I’ve always done that maybe other people don’t I’ve no idea, I’ve not had any issues so, anyway after candle and raising humidity just leave it be and you can check through the incubator windows or whatever it is yours has with like a flash light or something to see if any have pipped.
I usually get quite a bit of wiggling day 16, some on day 15, day 17 is either quiet or a hatch day depending on how fast they developed and stuff, and 18 would be my finish day, last few eggs hatch or are dead and I toss everything (actually I do not waste the shells) and wash the incubator.
All chicks into the brooder, heat lamp, tiny bit of water like a bottle cap and sprinkle some really small crumbled food on the floor. I don’t use a bowl til day two or so. Day 2 I also use a small bowl with marbles for water. I keep changing the water and food bowls out as they grow to fit their needs... That’s prob not common it’s just what I do cause I dunno why. Lol.
I use paper towels on the bottom they seem ok with that. I’ve not got any splayed legs yet, I did have a toe curl that didn’t correct itself after a day or two like usual so I made him bandaids for his feet and in 2 days he was good as new, completely fine. They have super powers to heal themselves!
Sometimes if my chicks seem slow to grow than others of the same age I will separate to make sure they are getting enough food and I also put baby vitamins minus the iron in their water this seems to help them catch back up. If it’s just one I give the vitamins into his tiny mouth with a tiny tiny tip of a plastic thing I have and then place him back he usually catches up to the rest.
So that’s it really. You sit back and watch. If one seems really stuck and catch push out of the egg people say leave it but I personally can’t so yes I will reach in and pop the top off his shell and let him finish pushing out and hatch. This has not affected my other eggs that are hatching or pipping but I try to only do it when no one else is mid-zip out. I wait til they have zipped and if they struggle at the push and yes I may reach in. Takes just a sec.