I have a still air Hova-Bator #1602N. I have two thermometers and two hygrometers for monitoring. The instructions say to fill the water trough as needed and then 2-3 days before hatch, fill the water troughs and then do not lift the lid until hatch is done. Whenever the lid is lifted, the temp drops 2-3 degrees instantly, how will this affect the eggs, and what if anything, can one do? I have 40 eggs from 3 separate roosters, all are marked. How can I mark/band the chicks if I cannot lift the lid for at least 24 hours once they start hatching? Thank you.