Are there any other eggs piped? If there is you probably should leave that one alone so you don't endanger the other piped ones if there is any, otherwise I'm no expert I'm just trying to think what Katharina would tell me, this might be the time to intervene. I couldn't intervene and help the 1 egg that didn't make it because there were others that were piped and I couldn't open the incubator, I had to make that choice, do I want to endanger the ones that are piped and zipping and possible shrink wrap to get into the egg that isn't showing any signs. Since this one is showing signs and pipping, I would wait it out, it's getting air, maybe it's unabsorbed yolk, not sure. But wait to see what Katharina says. She has been the ultimate helper. To me, what she says goes!