Once the chicks have internally pipped, I move them to the hatcher with a humidity of around 60%...you might be running a bit low for hatch time. If you don't have a separate incubator to hatch in, and you're having trouble getting your humidity up, you can place a new, wet sponge in the corner of the bator and that will raise your humidity. You don't want to drown your chicks, but you don't want to shrink wrap em either. Only add the sponge if you've already filled your water trays and are still having trouble with getting the humidity up. If you don't have a sponge, something that might sound a bit odd, but is completely safe to use, is a maxi pad
...yes, I said it! Trust me, it works! You'd be surprised how many people use them!