One method is, if the piece is small enough, rinse/scrub off any debris with plain water then boil it for at least half an hour then let dry completely. Another way is to soak the wood for a day in a 10% bleach solution, rinse thoroughly and dry completely. If you can still smell bleach keep rinsing until you can't. As a precaution, I rinse well then let it soak for a couple of hours in water with a declorinator in it. You can get it at any fish store. I have used both of these methods and never had any problems. Hope this helps.
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