So here is the materials SWIM used;

50g exhausted bark (1 previous pull from it)
48g Home Hardware Lye Chrystals
Ronsonol Light Fluid

Heres what the problem is;

SWIM cooked the bark in acidic water with vinegar for 1 day then filtered it out into a jar with a coffee filter. He then added naphtha to defat, he did 1 pull too defat. Then he added the lye slowly. Stiirred it up for a couple minutes. Then added Naphtha again aprox 50ml and shook the jar up. He put it in a pot with hot water to heat the jar HOT to create more solubality. He has now done about 3 pulls with the NP but it keeps turning up darkish yellow and isnt showing signs of going away as more pulls are done. SWIM wants to know is it possible that the DMT is already all gone and that the yellow is something else or should he keep doing pulls until it goes clear?

Later pulls and heated pulls usually give a yellow tinge to the naptha as it seems to pull extra stuff like NN oxide.

Yous should still have spice in your yellow naptha - you could reX if you so desire, as your spice will have a yellow tinge as well but it is also a very nice smoke, preferable sometimes to pure white spice.

Thanks ill tell SWIM. SWIM also says there isnt anything precipitating in the freezer from this batch. He thinks it might all be N-oxide.

Do a half evap and then back into the freezer. If the naptha goes cloudy when evaping then you should definitely have some spice (however the naptha might not go cloudy and you still have spice)

In SWIMS experience the nn dmt is pretty much gone after 3 pulls of naptha. If you suspect there is nn oxide still in the basified water do a pull with xylene or toluene. nn oxide is soluble in those solvents but not naptha. Evap the solvent and see what you get. There is a pic of nn oxide in one of the chemistry posts somewhere. If you have oxide you can either make changa with it or use a zinc reduction to turn it back into dmt. good luck.