Dry incubating humidity level Reptipro 6000

[crazzzymike13]

Last year I had lot of great hatches dry incubating with my Reptipro incubator. I wrote notes and everything. But my wife accidentally threw my notes away and I forgot what I'm suppose to keep my humidity level around. Anyone have an idea?

 

[jimlas]

I usually run the bator dry as well, but I keep a moist paper towel over the two vent holes on top just to keep the humidity around 25-28 ish. I do not cover the holes completely but hump the towels up so the air can get in.
I am in New Hampshire so the heat is still running.