A sticky naphtha residue left after freezing

[tangerine14]

Scenario:

Even after white crystals fall, the tray is dried and a wet looking sticky residue remains. Smells like fuel. How could one clean and separate this from the good product if that happened? Coleman fuel seems to bring problems.

 

[endlessness]

Did you do an evap test to see if solvent evaps clean? If not, you should use another solvent.

It can also be a mixture of solvent that hasnt yet evaporated, DMT, and possible plant oils. You can use some IPA or acetone to redissolve and re-evap it. You can also just keep scraping-rescrapping it and it might solidify/crystallize.

 

[Icon]

^ I get this often too and assume it's just plant oils accumulating (I re-use my solvent)

But like suggested, what works for me is scraping them from the dish to dry out a little longer on a piece of paper. Any oily residue is either left behind or evapped over the next few hours.