If i understand correctly ur asking if u should throw the away oil and fill the syringe with none bloody oil , defiantly not . if its your own blood then no worries just pin in a different spot .
It's no worse than a junkie who gets off drawing in blood and swishes it around before fully injecting it. The only reason you may want to start over is you may not be able to tell for sure if you're drawing blood on your second attempt while aspirating.
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