I have just candled my 35 various week and a half week old chicken eggs today that i set in my little giant incubator after 2 unsucsessfull hatches from it and am glad to announce that all but 2 are fertile and growing strong. the solution to my problem was not to fill the valleys full with water and only to refill it once a week. it keeps the humidity at a constent and at around 40ish. i have 18 due this sunday and 32 due on April the sixth.