The pictures didn't show up on my computer. I also have a tank, but haven't had any problem with humidity.
I would try moss which you can get at any pet store and put it in their hide. Make sure it isn't dripping, but is considerably damp. Also, you can put plastic wrap on half of the cage to increase humidity.
My room has a bathroom, so every time I shower it raises the humidity considerably in the room. I haven't had to mist in several days. Also, Basil is an adult male and has a HUGE water bowl which also raises the humidity. Try putting a water bowl on their heat source to raise the humidity. I also mix humidifying spray with water. I spray his substrate, run my hands through it, essentially burying the wet chips, then spray it again. I also spray his heating pad and side heating pad when his humidity is low.
If they aren't shedding well, try soaking them in a tub with water and a towel to get every piece of shed.
