Are your eggshells white or brown? Not sure if you said and I just couldn't find it. It makes it harder to candle if the shell is darker. A brighter light will help if they are brown. There is a great candling thread here somewhere. You might be able to search for it under candling. The OP took pics each day of his hatch as he candled. Gives a newbie (like I was when I used it this summer) a really good idea what to look for. It is the coolest thing ever when you get to see them move inside the egg for the first time. Literally, that was all DH and I could say when we watched it!