Single use needles only. Needles are discarded immediately after use and disposed of through incineration by a recognised medical waste company, as per government regulations.
All stainless steel instruments that are used go through a strict cleansing routine. They are first cleaned ultrasonically, then soaked in a chemical sterilising bath and finally placed into an autoclave. This destroys all bacteria and viruses (eg. HIV, Hepatitis etc).
The autoclave itself is tested regularly.
Disposable ink caps are used and discarded after each client.
Everything that touches your person is either completely sterile or new.