Those styrofoam incubators causes premature greying-age wrinkles,,,,you can have them set perfect for 4-5 days in a row,,and absolutley NOTHING is changed,yet then all of the sudden the temps are up to 105 degrees and you have no idea how long it has been that way.I had 2 of these here extra this summer because of a huge unexpected shipment of eggs that came unannounced,,believe me,as soon as there was room in the
Brinsea,,the eggs came out of those styrofoam bators.Many times with 3 thermometers ,,the temp would fluctuate 7 degrees in just a few hours,,it drove me nutts constantly checking,tweaking to increase-decrease just a little bit,then wait and see if that setting helped.They should name these Stress-Foam Bators,,seems to me with as small of an area that is made avaialble for the eggs,,(maybe 2 sq ft) it woudn't take that much to be able to keep the temp constant in these,,I think a wafer thermostat hooked to a 100 watt light bulb inside a cardboard box is less problematic.