This is my first hatch using an incubator.My first chick hatched appx. 41 hours ago. Overnight and this morning 12 more have hatched. There are 17 more unhatched-- most have pipped, though. I filled the water trays full at lock down. Appx midnight tonight will be Day 21. The water looks to be getting very low, and I am concerned about that 1st chick. My question is.. Should I leave it in there until they have all hatched?? Or, should I remove the oldest ones today, replenish with some hot water?? It does look as if it may be eating some of the "leftovers" from the other egg shells. Thank you in advance for your help. Blessings!