I have a friend I met on another web site who is very much into putting needles into her breasts and nipples. she is using 16 gauge needles and so far she is loving it. she is very much into pushing her limits. But she asked me the other day if there was a way to sterilize them after use. I did a little research and found a lot of conflicting information. some say use heat or alcohol, others say that wont work only an autoclave will do it right. any help to get this right ? thanks for the help!