What day are you on for your hatch?
When it starts becoming 48 hours after the hatch and I have ones that are still living but haven't hatched, I help them out.
I start to peel away the shell a little bit at a time and just peek in to see what's going on. I try to find the beak and make sure that the chick can get air. Sometimes they just aren't smart and can't get out, I cannot explain it.
I usually have my sterilized scissors, sterilized tweezers, sterilize gloves, sterilized drapes, Pedialyte, and cornstarch all on hand next to me in case I need it.