After your intitial freeze precip, youll want to filter out crystals and set the naptha out to evaporate further. When the volume of naptha has gone down to alittle less than half of original volume during your 1st freeze precip, you will want to freeze precip it again. This will likely give more spice, lower quality, but crystals nonetheless. You can do this until there is very little naptha left.
A good freeze precip time is 2-4hrs or longer if you arent rushed.
After that you can discard the naptha, as it is mostly impurities, or you can evaporate it off to give some nasties if you are a penny spice pincher

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As far as recrystalling thats simple, add all of your spice to a small glass or container. Add small amounts of naptha to this while mixing until you can see spice dissolving. Then mildly heat this for a minute with mixing and all of it should dissolve. Filter out any impurities and then freeze precip this following procedure above.
--------------------------------------------------*Kash's LSA Extraction* * Kash's Mescaline Extraction*------------------------------------------------------ All things I say are complete and utter ramblings of nonsense. Do not consider taking anything iterated from the depths of my subconsciousness rationally and/or seriously.