. . "However, they do provide a very safe and effective means of cleaning instruments prior to sterilisation. 3.5 Sterilising Tattoo/Body Piercing Instruments (and Any Instrument Contaminated with Blood or Serum) Tattooing instruments which must be sterile before use are the tube, nozzle, needle, needle bar and any other instrument that has been contaminated with blood or serum." . . . .