I would give them time. And leave them be. After years of "helping" I decided to just let nature take its course and found that most if still alive will hatch. Sometimes I have a 3-4 day difference from first hatch, (out of shell not pip), to last hatch. All of the excitement made me open the bator and handle the eggs; both of which will decrease humidity and roll the chick inside from their optimal location to pip from. This makes them more stressed and work harder to reposition. Sometimes it's enough to stop the process completely. Keep calm... it very hard to do but they have alot of work to do all crunched up inside there.