Last year I used hatchrite... put the bag in the incubator and it was ready to go the day I had my first clutch.
I was really pleased with it. Using the egg crating this year (only because I could not find anyone selling it again this year).
If I could have found Hatchrite again I would have used it. It was just too easy, and I did not want to take any chances. For 12.0$ it seemed like a pretty small investment.
Bruce