I want to cure a large peice of drftwood I found. I heard boiling it in a pot of boiling water will sanitize it, but it's too large to fit in a pot, so I was wondering if putting it in a sauna room or hotub would be hot enough to have the same effect. Also, I'm not sure boiling it in hot water will completely rid the driftwood of anything negative, or do I have to scrub it afterwardes