Do not use a spray bottle. Getting water on any of the electric parts of the incubator can break it. Put a dish of water in the incubator to raise humidity. I have never had to re-moisten the vermiculite during incubation. If you do, do NOT spray. You do not want to get any water on the eggs. Get an eye dropper and carefully drip water around the eggs into the vermiculite. You shouldn't have to do this though.
Don't worry about the eggs. Put them in the containers and leave them alone for 65-80 days. Check them every few days for mold or collagsing eggs, don't handle them to candle them, it risks turning the eggs and killing the embryos and also gets oil on the shell that will block the ability to transfer water and gases.
Just leave them alone. Candeling does not do anything useful. You should incubate regardless of what you see, and if you see a "problem" what are you going to do about it anyway...not hat I can think of what problem you might see.
Watch the temps..thats the best thing you can do.