Patience, my dear. If the chick is not progressing, but has a pip hole there very well could be a reason why she's not coming out yet. She could still have some very important business to take care of before coming out to join her buddies. I often leave a slow to zip chick up to 24 hours, or even to end of hatch, or when it's winding down, as long as she can breathe and otherwise sounds ok. Better to have her glued in the shell and have to soak her out than to try to assist too early and have her bleed to death.