Plasma does not break the skin in the way a needle does, which leads some practitioners to treat its infection control requirements as lighter than they are.
Single use means single use
Probe tips are single use per client. They are consumables, priced as consumables, and reusing them across clients is indefensible.
Reprocessing what can be reprocessed
Handpieces and non-disposable components follow the manufacturer instructions, and those instructions are part of your documentation rather than something to work from memory.
Logging
Autoclave cycle logs, with dates and results, retained. An inspector asking about sterilisation is asking to see records, not to hear a description of your process.
The treatment room
Wipeable surfaces, a clear dirty-to-clean workflow, sharps disposal where sharps are used, and a written protocol someone else could follow if you were away.