To me the substrate looks a little on the wet side. Could cause a problem. Get the substrate right on, get the egg box sealed and get them in the stable incubator. Then leave them alone and let the rest happen as it should. The more you open the egg box, the more in the way of temp swings, loss of humidity and better the chance of bad things happening. I don't even air out my egg boxes once a week anymore. I do open the incubator once a week to make sure there is nothing unusual going on.