It's day 7 for me so I candled a few eggs that I have. I saw some that had dots all over, I'm assuming those are probably bad. The other few that I looked at were dark the top third of the egg. What does that mean??? That's all I could really see, they are colored eggs.
I found it very difficult to be so patient and thought that I was going to have a poor hatch (cuz I couldn't see anything), but I had 10 out of 11 hatch (the 11th never pipped, checked it on Day 23 and it had died fully formed). In my case, any part of the egg that wasn't the air cell was totally dark. So, I would just leave them in and wait