If any of the goo is just impure DMT, then a re-extraction works great. But you won't be able to re-extract DMT N-Oxide with heptane or naphtha, it just isn’t going to happen.
The best way to recover DMT N-Oxide is the following:
Dissolve 1 gram of DMT in as little 10% hydrochloric acid solution as possible, and then add 1 more part 10% hydrochloric acid. Add 1 gram of zinc dust. Mix continuously for 3 hours. You will see bubbles form if the reaction is working. After 3 hours, filter out the zinc. Then freebase and extract into naphtha, just like you would normally do.
That method is proven to work. Substituting hydrochloric acid with a weaker acid or using something other than zinc MIGHT work, but I’ve not seen anyone report good results from anything other that the method above.
You may remember me as 69Ron. I was suspended years ago for selling bunk products under false pretenses. I try to sneak back from time to time under different names, but unfortunately, the moderators of the DMT-Nexus are infinitely smarter than I am.
If you see me at the waterpark, please say hello. I'll be the delusional 50 something in the American flag Speedo, oiling up his monster guns while responding to imaginary requests for selfies from invisible teenage girls.