Hi, I'm on day 15 of incubating. I candled on day 9, all 8 eggs looked good. Now candled today and on 3 of the 8 eggs the air cell seems to be really small. These 3 eggs are the 3 smaller eggs of the bunch. My humidity rate has been between 30 & 40% most of the time. Was this too low? Is there anything I can do about it now? The others look more normal compared to all the candling pics I've viewed on here. By the way this is a homemade bator & I rotate the eggs away from the heat every other day & I turn three times a day. I am also using the carton method. Anyone?