I was wondering if anyone had any tips in improving hatch rates. I got 3 dozen eggs from a man i know, and when i candled them on day 18 before i put my incubator of lock down, all had something growing and looked great except for 5 eggs. Now that they are hatching. they have been hatching on day 21-22, and 7 of the 36 eggs have hatched. Maybe 1-2 others have tiny peeping holes but the other, nothing is happening. What do i need to do?????