Well I'm a little confused as to why your dripping water on them? by doing this, this tells me you are opening the bator and right now, that's about the worst thing you can do. you'll cause them to shrink wrap.I sort've run a few warm droplets around the outside of the membrane, avoiding the ducklings' beaks and then after a couple seconds of the water soaking in, I draw out any excess with the pipette.
I heard a squeak just a minute ago, and the beak from another (bueish grey one - I call him Sylvester) opens and closes, moving his tongue about like he's tasty the air, he looks the most ready and moves around a lot.
Your best bet is to get a wet sponge or a glass of warm water to put inside to raise that humidity... if you are unable to make the adjustments with the bator itself.