I don't know what to do

[bcr229]

This is what his enclosure looks like

Ok, that setup explains the bad shed. A tank set up like that is almost impossible to keep humid - the warm, moist air will constantly rise out of the tank and allow cool, dry air to flow in.

I would get an under-tank heater (UTH) large enough to cover 1/3 of the bottom of the enclosure along with a thermostat to regulate it. The UTH should go underneath the tank with the thermostat probe sandwiched between the heater and the underside of the tank. You will probably have to raise the tank up a bit (I've used scrap 1x6's) so the tank floor doesn't rest on the probe and crack. Set the heat pad so the glass over top of it in the tank is 90-92*F. Put about 1/4" of aspen on the glass and put a hide over the heated area. If the heat pad is large enough you can add a second small water dish over the heater, the warm water will evaporate quickly and increase the humidity.

Once the UTH is set up and running correctly, remove the heat lamp and completely cover the top with either Glad Press n Seal or aluminum foil. You could also make a top out of plexiglass. That will keep the heat and humidity in the tank.

I would also replace the half-log hide with something made out of plastic or ceramic. Once the heat and humidity increase it's going to get moldy pretty fast.