The lid in question is a stainless steel lid that I welded together(very nicely I might add!). It didn't seal very well to the top(didn't know the importance of that feature when I designed it?) of the tank as it just sat on top and I would have to lift it on and off(Quite heavy).I tried the duct tape thing...I am pretty sure it was the lamp more than the tank? Thanks for the tip though! This is such a friendly site!!!New tank is working perfectly with the plexiglass insert! 70% humidity,81 degrees on one side,92 on the other! Woo hoo no constant misting!!.........Sizzle is still smiling...sort of...lol