I have one pipped and chirping! My incubator only holds three, so I was going to candle one more time since I hadn't seen any pips (woops) ...
I grabbed the egg on the far right, candled, and saw the chick had broken thru the internal membrane and it's beak was in the air sack! Yes!
Egg two, in the middle, showed a packed-in chick but no internal pip yet.
When I grabbed egg three, I had this fleeting thought: "Why is there eggshell on the bottom of the ... OH CRAP!"
I immediately filled a spray bottle with hot water and misted the membrane, while the chick from egg three peeped back at me as if to say "Whew! Thanks!"
Humidity is now up for hatch. Fingers crossed, and best of luck to everyone else!
Edited to add --- I'm *supposed* to have two more days before hatch, as I set on Thursday the 29th! Early birds!