Naptha can be re-used but the higher the temperature of the naptha, the more oils it will pick up. (Yellow N-N-DMT-oxide being one of them)
So if the naptha is boiling it will tend to clog up and become saturated, warm naptha however will not only take mostly the white N-N-DMT but will be much more re-usable, almost clear after precipitation.
SWIM has re-used naptha several times, as long as it is kept warm (not cold OR hot) then it will be best.
Peace and Love!
Q21Q21's Tek: A comprehensive guide to extracting DMTThe 2 teks use non-toxic lime and vinegar and Tek 1: d-Limonene or Xylene or Tek 2: Naptha to produce very quick high yields with the greatest of ease.I am almost never on this site anymore so I will likely not answer PMs