I agree, and I need maximum hatchings from this incubation if I'm to realise my dream of fortune.
I think that helping is probably the best option, but it's difficult to gauge when to help at the last minute, but before they die. I have made the ghastly mistake of helping too early. With success, thankfully, I might add. I've done it with a couple of ducklings who I helped after they had pipped a considerable time before. It was obvious once I'd helped them out that they actually weren't quite ready. All were fine, but it wasn't a great experience for me or for them! Loads of egg white and they were weak for a couple of days. One 'helped' chick had splayed legs, which we sorted out, but I assume was the result of my interference.
So, the remaining two eggs pipped 12 hours ago, chicks alive and cheeping, but no sign of exiting. And you're so right, Little Blue, about opening the incubator too frequently. Chris, the incubator water is kept full, but I suspect that there may be some issue with the water. With the last duckling hatch I put a wet sponge into the incubator for the last 3 days. Very scientific.
It's like the Eastenders of the chicken world around here. Always a drama.