Insulation Materials, Foil, And Plastic Wrap Questions

[mainbutter]

I use foil taped on the top of my tank and it does a good job at keeping both humidity and heat in. I leave only about 1/4 of the screen exposed for air.

ditto, I do the same.

I've been pondering replacing the single layer of foil with a dual layer of cling wrap with foil on top, seeing if it helps even more.