There are very small vent holes at the bottom of the NR 360 outer ring that does not hold water. I would not use press n seal or paper towels, or anything that might block those vents or reduce airflow. I put shelf liner on the rack of the NR 360 and it keeps almost everything contained.
I haven't found a way I just know mine is 4% higher so I need it to read 4% higher than what I want it.
The incubator is designed so you can close that top vent up to half-way to increase the humidity (says so in the operating instructions). As long as you have it at least half open, all will be well with oxygen for your chicks. For lockdown, I put shelf liner over the entire shelf, closed my top vent 1/4 way (3/4 open) to get around 58-63% RH, and we were good to go. 21 out of 24 eggs hatched, and all developed, so it seems like 58-63% humidity works just great for hatching in. I would feel comfortable hatching around 58% humidity.
Thank you. normally I have no problem getting it to about 63-65% so was a bit worried with it under 60.... I will try not to worry so much and if I need to close it a tiny bit.
I did manage to track down a pdf with the way to do it. Hold down menu, +, - at the same time for 5 sec till it flashes C 0.0 then its + or - for temp, hit Menu again for Humidity + or -, and menu to exit.
I have not noticed a difference with the inner circle. I, too, have 22 eggs in mine right now and all of my inner circle are growing except 1. On the outside I have 10 not growing.
I usually rotate my eggs every day or two from inner to outer in groups, so they are never in the same place.
