I may have found a solution in case anyone is interested.....
I did an A/B on half of my brown DMT powder (dark brown with tan specks) that was left from the freeze precip I did. The A/B worked EXTREMELY well on the 500mgs or so that I tried it on. I got back almost 100 percent that I put in...so little to no lost in yield. The resulting spice was some of the cleanist I have ever seen...more clear than white. Thanks for that tip Acolon!
Side note: It is really cool to see an A/B extraction starting from DMT instead of plant matter, you can see all the things that are usually blurred by thee color of the soup, like the DMT crashing out when it is basified, how much is left after the first naptha pull, how much more effective hot naptha is instead of cold, etc. If you are like me and are just as fascinated by the removal of the compound as you are by the experience that the compound provides, do try this sometime.
But that is not the solution. A seperate A/B is a bit more work than most would prefer. I found this next part out by accident...
I was cleaning my pyrex evap plates with 70 percent iso alc. (would rather not waste precious solvents on clean up), and I noticed something odd. I poured some iso into the plate where the drying of the original freeze precip (dirty brown/red spice) took place, which still had quite a bit of brown spice stuck to the sides, and noticed that, while the DMT residue was being solvated, the brown particles were not. I added more iso, thinking I had not added enough to dissolve it all, but could not get it to go into solution. So, naturally I filtered and evaporated and lo and behold, what should have been 50-100mgs of dirty red/brown powder, was 50mgs shimmering white goodness.
If I cleaned this plate with naptha, it would have turned the naptha orange again (I know because I have tried) but the contaminant does not seem to be soluable in isopropyl. I have half of my brown batch left and will try to repeat these results with 99 percent iso tomorrow. Maybe acetone will do the trick.
Will post results...