Don't forget to reuse that naphtha if you can. SWIM found out very fast that it actually contained double what he collected initially. He recommends doing very small naphtha pulls and putting each into a separate jar if possible. Combining them seems to pull less DMT out when freezing, more is trapped in the naphtha. You may find that you lose more spice by sticking to the jar after you empty it but...SWIM uses a tiny amount of naphtha to dissolve this DMT and transfer it to all the jars, collecting whatever DMT is stuck to the sides. You can either reuse this naphtha, or try re-precipitating in the freezer. He believe a re-precip might be better. No sense putting the extracted DMT back into the sludge.
Let it soak for a while too, before pulling with naphtha. He did much better on his second extraction, having leaned from his mistakes in batch 1.