This will be of no help whatsoever, but you may find it entertaining...
I once bought a cheap pair of bongos at a garage sale. When I say "Cheap," I mean CHEAP. No tensioners, the heads were nailed on the shells, and were VERY loose. They were made of cow hide, and I knew that leather shrinks when heated. Turned on one of the burners on my stove, and held the bongo head about 1.5 feet above the flame. Worked like a charm on the first head, went to the second.
Held the bongo over the flame just a little too long, and POP, the head split, right in half.
Let me tell you, it's no fun playing ONE bongo.