What's your normal hatch rate? Thanks for the advice, I'm going try the test.I like 30ish percent RH to day 18 or 19 then up to 70% RH. 25-35% is pretty good but if on high side of that range find I need to run completely dry for few days prior to upping humidity for hatch. Hence the sometimes running dry to day 19 in attempt to grow the air cell more.
Perform a salt test on your hygrometer, they can be off by quite a bit and need calibrating.
You should flip the eggs no less then 3 times a day, i flip mine every 2 to 4 hours in the day ( i'm a night owl so around 3am is the last time i flip them until i get up which is around 11 to 12) if you don't flip the eggs 3 times a day the embryo can stick to the shell and died.So less humidity is better it seems? First time I've done this. Should I flip the eggs every single day or is once every several days ok?
Thanks for all this input.
Let me bee clearer why I will run completely dry sometimes. I candle the eggs around day 10 to check for any clears to toss and quick look at air cell size, make any adjustment I can if off a bit. If the air cell is still not large enough to my liking day 14 run completely dry until they are the size I want then up to 70% RH. Sometimes that will go into day 19. It's very dependent on your house humidity. Some springs the incubator only needs a shot glass sitting in it to get 28-30% and if that's the case don't have to do anything. If fumbling with container size and finally settle for something pushing 35% I'll have to run dry to catch the air cell size up.
Here's a diagram to give an idea of what I shoot for:
Nope, can't find the photo since the new fromat...google or search here for "egg air cell size by day".