I usually dissolve the product in a tiny amount of warm heptane, and submerge the container in hot water while mixing. Then carefully decant the solvent - it will instantly become milky.

Then I repeat the washing and decanting procedure several more times until the solvent is clear.

The collected solvent is the freezed but >90% of the crystals will precipitate at room temperature.

The residue can be smoked/vaporized and gives somewhat different results than pure DMT. If only a single washing is done, then the residue is very strong.