Ack, think I lost the post I thought I sent ... oh well, here goes again.
I use paper towels (Kirkland aka Costco brand 'cause they are the larger size, are sturdy, and price is good). I use two layers (still attached), such that the two loose sides bend towards each other. Folding one side as needed for a tight fit, now the paper towels are the size of the cage/enclosure bottom.
I use a food dish for mealworms (usually with calcium in a small pile inside) in one corner, a water dish in another corner, and a dry hide in a third corner. As I place the items, I smooth the paper towels so they lay flat.
Also, I replace the paper towels every 2 or 3 days which probably helps too.
Good luck - and keep trying different things; with persistance you'll find a method that is easy for you and safe/sanitary for your leos!
Andrea A.