wow this is a +rep fiasco!
i ahve tried it once with my finger. i just washed my hands with regular soap. and i had no infections after. personally it didnt do anything for me but i think my finger wasnt big enough. its relativey easy to sterilze. you can just use soap or you can QUICKLY dip in boiling water. or freeze it. theres alot of ways. its up to u to chose!