When mine laid eggs, I popped a plastic breeding net under the eggs. If you can fit one under without bumping the nest, I recommend it. When the babies hatched they fell into that, this way they did not get lost in my tank or eaten when I vacuumed(or by my fish and other snails!). Makes it easier to clean up after them and feed them if you keep the hatched babies in a net. I put in some java moss for them to hang out on and nibble if they desired, along with fresh foods I prepared and...uh...algae wafers, the good ones I think(they didn't have many additives, I just can't recall who makes them. They had spirulina in them, mostly plant matter, I believe it was omega one, not sure though. Hikari isn't too bad, but I think the others are better). You can feed them blanched zucchini and cucumber(remove the seeds!) and some other fresh, blanched veggies. They'll eat well and grow quickly.
As for misting, I suggest you get an actual mister, or spray bottle and spritz them 2-3 times per day, just one squirt.