if its still yellow colour spice then try re-exing again but keeping the naptha cooler you should end up with a oil yellow/orange globe on the bottom which can be seperated(dont throw it away though) you then freeze precip the clearer naphtha and you should get whiter colour crystals, i find that when the solvent turns yellow during a re-ex the resulting crystals will still be yellow and it takes a cooler re-ex to only dissolve the dmt and not so much yellow stuff. its up to you though how you do it some people prefer the yellow stuff i find it tends to have more of a body feel, and the whiter is a cleaner more heady trip.
you can use the globe you seperated and re-ex it again to ensure theres no more dmt left in it, it will usually start to crystalise or solidify a bit if theres any dmt left in the funky goo.
the left over stuff you got in that picture i would just throw away or do one last re-ex after, it looks mostly like bits of plant material and not really worth saving but still do until you can be sure theres nothing left in it. i can easily tell if theres dmt left in there. just by looking at or smelling it.
PROHIBITION?? - just say NO!!