Patience is key to hatching. Just wait and see what happens. Your humidity is fine. My most successful hatch, I had a humidity of 55%. Once they start pipping, the humidity increases on its own. When I had the humidity at 55%, once they pipped, it jumped up to 70% within half an hour! They'll be fine.
I saw a video of people in central America where it is hot and super-humid all summer long, hatching in a "styrobator" that didn't even have a top on it, no thermostat, no electrical parts at all. The chicks just hatched right there in an open bator on the kitchen table. It was pretty neat.