I would do a last candle and mark the air cells. Lay them with the lowest side (dip) of the air cell facing up so you can see the pips. Stop turning/take turner out. Raise the humidity up. I use 75%. I fill my water wells and add a couple wet sponges to the bator. If you get condensation, cut it back. And then, just wait...and wait...lol
Marking air cells from the beginning lets you keep track of the growth so you know how to adjust humidity. Marking air cells at day 18 helps you know how to lay your eggs down so that when they pip you can see them. Generally, (and there's always a couple that didn't get the memo,) chicks pip in the vicinity of the lowest dip of the air cell. If you mark them you can face that side of the egg up and you will be able to see the pips as they happen. (If you are home to see them...lol)
That's great!! It's quite normal. Temps could run the sligtest bit warmer, but I would not make any adjustments. My last two hatches started day 19 all perfectly normal and healthy chicks. Heck both my broodies that just hatced out hatched out on day 20.. Nothing to worry about. Relax and enjoy those little cuties.
