I just got my first clutch of eggs on Tuesday, 5/13; and I noticed today that one of the eggs has indented a bit. I have them at 84 degrees (+/- 2 degrees), they are in moist perlite inside of deli cups w/ lids and holes for ventilation, inside of a hovabator. I have a standing pool of water in the center of the hovabator to help keep humidity levels up. My question is, should I be monitoring the humidity level with a gauge? And, if so, what would the proper range be? Or, is there something else I should be doing for them?