Incubator question add more water or not?

This afternoon my hatchlings will have been in the incubator for 24 hours and time to remove but last time I did this the others that had pipped became shrink wrapped because the humidity drops so badly should I top reserves to the full again top up half way or spray eggs with water obvoiusly gently! which is what we used to do with ducks when we had a very old poly hatcher has anyone any prevoius experience on this and just wonder what suits best for any of you! Thanks

ok will try a sponge as we have 10 hatchlings already but 10 still left I am very excited as we bought a couple of polish and both have hatched and the easiest to identify with wonderful pompom heads which my daughter finds totally amazing thanks