I'm new to hatching myself but I'm thinking maybe your humidity overall was too high.
@Pyxis has a great article on beginning hatching. When I started weighing my eggs to set my humidity, I went from 25% hatch rate to 69% hatch rate to 76% hatch rate.
Sometimes I do think there is just an inherent issue with the eggs development though and that is what kept it from hatching. I've also noticed that unstable stormy weather has also affected my hatches. I had one this last hatch that I ended up assisting (it had pipped in the middle of the egg instead of near the air sac)
and was struggling to zip for more than 24 hours. I assisted as the rest of the babies were due to come out the next morning. It is struggling and today
is day 4.. I don't
predict that it will make it, unfortunately 
How many eggs did you set that didn't
end up as clears?