Well, for my first cage, I was still under the "Anything other than screen cages for chams is wrong!" Belief, so I got a screen cage. Since then, I purchased 1mm thick PVC sheeting to close in three sides. Basically turning the cage into a DYI dragon strand cage. Since then all my cage purchases have been dragon strand. If humidity is still a problem, I will find some very thin plexi glass and close off the front door leaving only the top and the bottom maintainence door open. I am not too sure what to expect with these darn dry Minnesota winters.