Yes, it's well worth being careful in the first place to have a purer initial extract. Your method as described is (or should be) pretty standard.
Transferring your naphtha from the base soup and into an intermediate jar before putting it into the freeze precipitation container also eliminates virtually all of the base soup contamination.
[
Reading your recrystallisation thread, it sounds like you used too much naphtha. 5 - 6mL would have done the job. You want only as much near boiling naphtha as will dissolve your spice.] Edit: Actually this would only apply if you were going to freeze precip., and it seems you just evaporated. I'd suggest using less solvent and freeze precipitating.
As an example, I have known of 600mg spice being recrystallised from 6mL boiling naphtha and yielding 580mg pure white crystals from a freeze precip. The main contaminant was a tiny bit of basic sludge.
Your lost yield is still dissolved in the orange goo. It won't be all contaminants. If you still have the orange-coloured oil, it can be extracted some more as it still contains some goodies. If you separated it from any basic sludge, it could even be used as it is. Or you could consider a mini A/B for a cleanup: dissolve the goo in a little white vinegar, re-basify with, e.g., sodium carbonate and pull with acetone or naphtha.
It's possible your initial pulls were a little on the warm side as this may tend to pull more orange goo.
Good luck, stay safe!
dfz
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