I'm working on setting up my bator for hatching and I was planning on using the carton method....so the question is cardboard or styrofoam? I would tend to lean towards cardboard because it's a more natural material, breathable etc. But, if I put them in styrofoam cartons with most of it cut away...would that be okay? My thought was that they styrofoam wouldn't mess with the humidity like the cardboard would. Thanks all!