I had a test that showed it as well. The next test on a different strain I did showed nothing.
I believe it’s the strain.
I don’t use acetone to clean anything and my gas is distilled (I used the same distilled gas for both).
So I’d say you had it naturally occurring from the plant.
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Just clean with hot butane vapors
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Lodawg
23
Will defs hit a warm butane clean before my next run!