I just had them in netcubes under a heat lamp, which normally does the trick for most species.
But that wasn't cutting it, so I put a layer of paper towels, followed by a layer of coconut fiber, followed by a ton of leaves down on the bottom of the cube. I also put some fresh branches with the leaves still on in the cage, because someone told me that adding dead leaves was the trick (though the leaves I had were still fresh when I put them in last night). Then I misted the heck out of everything.
And that seemed to have worked. The male has mounted the female, and I'm about 90% sure they're connected but I don't want to bother them too much trying to find out.