I have a four by two cage with a wire front. The temperature goes between 80 to about 85 or so. I have two plants in the cage with a water bowl directly below the heat lamp. I fill the bowl daily to allow for the evaporation that hopefully increases humility. So far no luck. It is stuck between 38 with a high of about 44 percent. There is no fan in the room to cool it off.
The crate is made of 1/2 inch plywood and lined with black contact paper, sitting with back towards window that allows sun to warm it. I also have a heating pad in one corner but both snakes seem to prefer hiding behind the plants instead of lying on heating pad. I have no hide in there as the one corner is almost completely dark even during daylight hours and at night you cannot even see inside the cage.
Will more plants increase humidity or is there a small humidifier that I can buy to put inside the cage?

Outside on the porch was no problem temp was great as well as humidity.

Suggestions are more then welcome.