Is this from the vendor from Mexico?

A defat really should have taken care of almost all of the oils.  Sounds like what you got was very oily.

Do a recrystalization but if you can, try a sodium bicarbonate wash while your spice is in a NP solvent, I have noticed that the baking soda wash will take out some of the oils as well.  It may take a few recrystalizations, but you can get oily goop into white/clear crystals.

Anyone else have any ideas?