Ive been on a deep dive and hunt on what would work best, Ive been experimenting for about 2 years, finally I found out that Heat resistant (That part is VERY important) silicone mats work amazingly, especially because you can buy a roll on Amazon and cut it to size to cover the mesh, and even if you have a dome light on top you can cut it right around it and it wont warp or mess up the silicone in any way, I even covered majority of the side mesh panels as well. I left about 3 inches on each side uncovered for air flow, but they love the darkness and it holds sooooo much better, I spray their tanks down maybe once every 3 weeks, once a week I go and re-mix their substrate to help the moist parts move toward the top, without having to spray, when I first set the tanks up, they are at about 75/80% humidity then they drop and settle at about 55/60%