I saw someone else using press and seal. I have adopted this method as well. I had a humidity problem with my first clutch this year. It was a four egg clutch and all four dimpled in about 20 days into incubation.
I use a substrate free method and I have a fan in my incubator that runs constantly. With the fan running all the time there was too much airflow into the tub between the lid and the tub and my water reservoir dried up. One of the embryo/eggs died. I carefully poured more water into my reservoir and I put press and seal under the lid with a few 1/8 inch holes and the other three recovered and seemed to absorb a little moisture. The 3 survivors are due to pip this Thursday and I fully expect them to live. Hope this story answers some questions.
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