Unfortunately I don't think there's much you can do other than getting a taller enclosure. Before I caved and got my exo-terra for my WTF I cruised craigslist daily, trying to find someone giving up a taller fish tank for a decent price. I was considering hexagonal tanks or the extra tall aquariums. Although, in Maine is very difficult to find anything. My selection was just too limited. But you might have better luck. Sometimes people just give things like that away because they don't want to deal with it. I had my WTF in a 10 gallon before I got my new terrarium and he used to try to get out too. They just like to be higher up!