You definitely need to try to get the heat up. What kind of heat mat do you use? Some can be insulated which is why I ask.
In the meantime you can insulate the rest your tank. You can use aluminum foil, shiny side facing the inside of the crabitat. Then, do a layer of cardboard or styrofoam. This can help get the heat up. You can also try drying warm blankets/towels without a dryer sheet and drape it over the tank to help warm it up. You can do layers of this.
Try offering raw honey also. If you have access to bee pollen that would also help.
Good luck! Going to tag @AussieJJDude for input on Aussies
