Hi, I had 2 dozen eggs in my first time incubator try and things started great. I had 8 chicks in the brooder last night and more hatching so I left them in the bator over night. This morning I had 6 chicks and left them in there till I returned home from work. When I got home I had 5 dead chicks, 3 alive and all the rest of the partial hatched eggs(chicks) dead. I opened the dead eggs and all but two had dead chicks inside. The humidity was 80%, was this the issue or ??? I'm happy with the start but still discouraged some on how it ended. Help me find an answer so my next run will have a better outcome.