i have a sports man 1502 and it holds temps like a champ!! but for some reason i dont kno why but some off my eggs will start do devlop then die get the blood ring my humidity is 49-52% for the firs 18 idk what im doin wrong or is this normal this happend to 2 out of 12 of my eggs and help would be great o and i have the plug in to keep the humidity to that point but one whole in back an one on side is still open so it should be getting good air right? if i remove plug it will go to like 40-44 let me kno what yall think