Looks like I go the opposite way from most who have responded here already. I don't do water jugs, I keep a huge tub of water on the bottom of the incubator. I keep my overall humidity up with it and it also helps keep them temps stable. I also have a rag hanging from the bottom rack down into the water tub to act like a wick and help keep humidity boosted.

Figure out which way you think works best for you and go with it.