Yeah wash is to remove lye and other polar impurities that may have come across from sloppy separation (or tiny droplets of mimosa+lye mix suspended in the non-polar solvent). Madcap is right that theoretically dmt n-oxide is reasonably water soluble but AFAIK nobody ever tested how much there is of n-oxide from naphtha pulls anyways. N-oxide is not soluble in naphtha at room temp but when temperature goes up, this will likely change. But is there much n-oxide in mimosa in the first place? Any evidence of that? At this point, until we have further evidence, I guess you should just follow your feeling.
CrushNazT, I think the key to make it smokable is two things: Make sure to dry the crystals properly after retrieving from naphtha, maybe redissolving them in another less toxic solvent like pure ethanol or acetone and evap again (to remove solvent traces trapped inside crystals). Then, the other key is to get a good smoking device. Me and a lot of others here feel that the glass vaporgenie + torch lighter is the smoothest most effective vaporization method by far, but if you dont have money for that, the classic genie can be another option. Before I had the genie I used the herb/ash sandwhich in the bong method, and it was quite good once you got the method right (keep flame as far away as possible and take 3 deep slow long hits). Nevertheless the genie still is much better.
As for the crystals, yes they are forming because naphtha is super-saturated at this temperature. If you let it at room temp for a while more, then move to the fridge for a couple of hours, and then keep alternating over a day or two between room temp-fridge and fridge-freezer, then finally to freezer for 12-24 hours, then you'll have some beautiful crystals. But the yield and effects will be just the same, so if you dont care, just put it in the freezer straight away. But if you are not in a hurry, I recommend doing this at least once in life, its such a beautiful alchemical-like process. Take pics and show us after if you do
I seriously hope, though, that this big quantity of dmt is used rightfully, not sold, and all of the other things you are well aware regarding
health and safety and our
attitude here