I am not real experienced, I am on hatch #2, but I wondered if you can see the beak, or not. Last time I had two that were pipped for a long time, about 30 hours, and they were not even trying to do anything. They were sitting with their beaks at the hole, and the peeping got fainter and fainter. They never moved away from the hole to zip it. I helped them, one died one diddnt.
I would say to wait. No one knows your exact situation, however, I would let them go longer, if you do it too soon they could bleed to death. Esspecially if the membrane is still intact. they wont dryout if they have not pipped through the membrane.