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Do you guys always switch needles between oils in the same syringe? Like if you do a Test and Mast cycle, do switch needles before you draw from the different vials?
I have always switched between vials but seeing how I burn through needles I just wanted to see if it was any harm to use same needle?
I have always switched between vials but seeing how I burn through needles I just wanted to see if it was any harm to use same needle?