I used q21's tek to extract spice, with heptane substituted for the naphtha since it's not allowed in California, and I was wondering what other people do to further purify their spice. I want to try again and am really wondering because if naphtha is used for the original extraction, people have said to use heptane for the recrystallization. If I used heptane, what should I do for a wash and recrystallization? I want to get rid of some of the harshness and have a purer spice. Thanks!