if SWIY feels he used too much naphtha, evap some outside, and when there is only a bit left, put it in the freezer. Wait a whole day, and then either:
1-quickly take the container out of the freezer, and while the cold naphtha is still inside the container, scrape the sides and bottom with some knife/razor/something (careful with not splashing stuff) so that the crystals start floating.. then pour through coffee filter. Ideal is to make some improvised vacuum suction with a funnel, a hdpe container (like milk jug), and a vacuum cleaner (if interested I see if I find a post I made sometime about it). Anyways, filter the crystals till dry.
It does happen sometimes that if its not filtered with vacuum, some dmt melts into the filter as the naphtha warms up, so vacuum filtering is recommended.
or:
2- remove container from freezer, pour naphtha off quickly (can be through coffee filter just to make sure, but most dmt will be stuck to the sides and bottom of the container), then put the container upside down, resting at an angle, so that any remaining naphtha will drop out, and also that there is space for air to come in. Put a fan next to it so that there can be great air circulation.
different people have different preferences, find out what works for SWIY. Just remember to work in a way that nothing falls down/spills, because then you can always save the actives even if something goes wrong.