Dr. Koelkebeck,In general is there a a degree or two difference between an empty dry incubator and an incubator with wet cells? I'm trying to set the temp on incubators and finding 1-2 degree difference. The dome incubators are very touchy to set so I'm trying to prevent the teachers from playing with the thermostat. Should I set the temp with the wet environment or dry. I test the incubators for 29 kindergarten classes. In the past I don't remember having to change the thermostat.I