this may not be the best advise, but I have bleached some in the past. if you do just make sure to rinse them off really good after, and soak them for a while in clean water, a few times just to be safe. I never had problems when I did it.
DROP THEM IN A VOLCANIC ERUPTION AND THEN THEY SHOULD BE GOOD... No to be serious, you have to purdy much boil them to get rid of any parasites etc on them..