what bout putting it in a deep freeze. or a big plastic bag and some car exhaust that should kill anything lol or what bout a bonfire and heating rocks get the wood wet and place on really hot rocks, would possibly boil out the nasties. i know you dont want to soak but what about a 45 gallon drum filled with water and heated from the bottom to boil the water then place the objects inside. ummmmm picking my brain......what about a natural bug repellent like crysanthimum oil or similar. wrap in tinfoil and bake in a bonfire, thats all i can think of right now lol