I was looking at petsmart today and was amazed to find that just plain looking pieces of wood costed upwards of $15. I live right by a river and was just going to pick a couple pieces of driftwood. I know i shouldn't just put them directly into my terrarium. I've heard a few different ways of sanitizing the bacteria and germs. It seems kind of dangerous to have a couple pieces of wood in the oven for 30 minutes at 350 degrees though. What would be the easiest way to get this driftwood clean enough to put in the terrarium?