This is my third try with incubating. My first try was a complete bust with 12 eggs. I had 2 of those hatch out but one died almost immediately and the other had deformed feet. The second time I only tried 7 eggs and got 1 healthy bouncy chick from that hatch. This time I'm going with 20 eggs. I'm really not sure why my hatch rates are so low. My temp and humidity stay perfect. Most always make it to at least day 19 and then decide to quit on me. Any advice for those last few days?