I checked my eggs last night, and used the IR gun (reptile basics 412L) on the actual eggs at an 8-12 inch range. Surface temps of individual eggs varied from 87.5 to 89.9, I'm incubating in a Natures Spirit with Herpstat set to 89.0 and a LOT of water bottles, temps have been super stable. Is that a normal temp spread for actual eggs (am at day 33 if that's relevant)? Does it mean anything? Thanks!