I have EE eggs too. I just candled them last night with a home-made candler. I used a 35 watt halogen desk lamp with a cut-down mouse pad over the rim to block all light. I cut a 1 inch aperture and put it dark side up. I had to have a very dark room to make out anything. When I tried it with some ambient lighting I couldn't see anything.
I was able to see that out of 11 eggs set, one was a yolker and the others look the same with the same amount of shadowing. I could make out veining in 3 of them.
I had a hard time with my Ameraucana's too, when I candled, those were the one's that had the most question marks on. All but one hatched but I was only clear on 2. Next time I'm going to take some of the advice here for a better candler.
The most important thing is making sure the room is dark enough. It has to be pitch black to see in some eggs really well. I usually wait until day 10 too for darker or thicker shelled eggs. Typically if there's an air cell and it isn't bright inside, it's growing. Good luck!
Agreed re the ambient lighting... even the tv on in the next room makes it too hard for me to see through.
Hope you can see stuff soon... for me it became very apparent at about 7 days that four were yolkers... cracked them, and they were... then one developed a blood ring and lost its veins, cracked and it was early death... then one last one had lost its veins and seemed like a smaller dark area with blood pooling... also a dead chick, with the insides on the outside. Kinda glad that one did not make it. At any rate, I think my point is to use a super dark room and to compare the eggs to one another. The lady I got mine from said just to shine the mag light down onto the top through the air cell, and you can see veins all around. That does seem to work, but I hold them, too.