I gradually increase it over the 3 days to about 70 when I see the first pip and have great hatches. I had 73% hatch last time on shipped eggs. I won't lock down until tonight. Check the aircells. And decide how much water to add. It is 70% rh in the house at the moment. I only added a small amount of water on day 7, because humidity was quite low that week and the cells grew quickly. They were right on track for day 14. The humidity has been around 40% in the bator without water since day 14. I set mine at about 10:30 pm. Mine usually pip day 20 and finish hatching day 21. Roll on Tuesday.
Yep, it is different for everyone. I have mine around 50 right now, will up it tonight to 60. I had them in a brand new bator, wasn't sure how it worked..boy that thing holds the humidity! I have some small air cells. Will be interesting to see how they do. I've had them hatch with the air cells this size before, not all of them are small, most are right on...so, exiting..excited for Tues. also!