I used marsofolds tek on 1/4 lb and after evaporating I got yellow oil covering crystal formations that could only be scraped into goo. I redissolved it in warm naptha, allowed the naptha to become very saturated then freeze precipitated.

Snow globe but at the bottom was the yellow oil, now hardened into a wax. Where there isn't wax, there are obvious crystals. How do I get them out without gettin the oil on them? Pouring off the naphtha the first time, some of the oil accidentally got on a few crystals and turned them yellow.

I can't get the large crystals stuck to the bottom and sides of the jar out. My plan to get them out was to add naptha, allow them to dissolve then Evap those last bits, but if I add naphtha, the oil comes with the crystals.

Tip.
Dont use jars for freeze precip. Use the small glass trays with lids. (tupperware) they are much easier to scrape the crystals.

Or just do a quick recrystallization with fresh naphtha, or heptane (brand named bestine online and in US). A quick re-x will help remove any yellow, especially goo, and probably make it vaporize even smoother.