From my first batch of eggs on, air cells have been the biggest and most frustrating issue. The two eggs that hatched out of the first 28 had air cells that firmed up pretty well, just a little wonky on one side, and even that wasn't real bad. The others were just bad..and stayed bad.
I do everything I can to help the reattaching process along, aside from opening them and using Gorilla Glue to anchor them. I let them sit undisturbed. I don't turn them the first few days in the incubator. I keep them upright in the incubator. I maintain a steady humidity - not high but with minimal fluctuations. When I candle them I keep them upright and candle from the top down.
Got new eggs coming from @RubyNala97 and she said the air cells in the ones she sent are so small she can barely make them out. That and the fact that they were gathered yesterday and today and then shipped right away today should help. It's just a sad fact that here express mail means Pony Express! But I have more confidence in this new batch of eggs - although what I'll do with a dozen Silkies in a rough cowboy kind of community I ain't sure!
Here kids ride their horses in town and stop at the convenience store for an ice cream or can of pop! They just tie the horses to the bracket the tire air hose is wrapped around!
I'll keep the three I'm most concerned about upright in carton cups, then. I wonder how I'll know if they are pipping on the bottom if I can't see the bottom, but that's a small potato problem compared to just keeping them alive through hatch.