I never used a real incubator for the eggs ...I used a set up I created on my own. I never checked the humidity in the containers either. I used shoebox sized plastic containers with lids that I filled half full with slightly moist coarse grained vermiculite. To test the vermiculite for moisture I took a handful and squeezed it and if I could squeeze only one or two drops of water out of it then it was right. I laid the eggs in rows in dents made with my thumb and put the containers in a dark area where the temperature was about 74F....on my made up set up. Beads if moisture would form on the container and I almost never had to add water during the whole incubation time. Hope this helps.