Changing the substrate?
I use 6qt locking tubs, vermiculite about two inches thick, with light diffuser on top. I add water in the corners until the vermiculite is thoroughly saturated. I don't really ever check them besides the initial vein check and peeking through the incubator glass. I don't have to add water. There is no humidity in the tub until they are about a week from hatching and then condensation forms on the tub walls. I cut at day 50-51 with small triangle slits. They usually come out 4-5 days after. I incubated at 90.5 or so.
Regards,
B