i also had one hatch link and placed a mirror on the on side of the brooder box with a stuffed animal next to it, shes was so impressed, started picking and looking at her new friend then fell asleep. best advise from me is a mirror and a stuffed animal next to it.
The
It destroys the protective layer around the egg, just like rinsing it with water does, and if the refrigerator is set below 5 degrees C it can kill the embryo.