The heated disks or heated bags do help some in that the warmer air within the bag can hold more moisture than colder (non-heated) air. So, yes, they do help to some extent. My own personal feelings are in agreement with yours in that more holes in the box will serve to ventilate the warm, moist air away from the pizza, and this might also help. Get an Exacto Knife and begin cutting a few additional holes in your boxes to see what happens. Then there is the bag itself, my personal feeling is that we need to seperate the moisture from the warm air in the box. The technonlgy is there to do that, but I’ve not seen it done yet. The approach is to use a breathable membrane material like (GORETEX) as part of the bag. Think of a bag with a large Goretex panel as part of the top of the bag. The membrane allows moisture to escape from the bag (that’s a good thing) and the silver color of the material reflects the heat back into the bag to help keep the pizza warm (that’s a good thing too). I use this stuff all the time as part of my hunting clothes and it really does work the way they say it does, so I’m guessing that it might work just as well in this application too. Remember where you heard about this, I’ll take a 10% royalty on gross sales.
Tom Lehmann/The Dough Doctor