In the end, it seems that the problem was that my yield has been much, much higher this time (a good problem to have!). Dissolving that residue in water and cleaning with IPA for a second time was enough to get a clear residue and more resin from evaporating the IPA.
I think my technique may be improving, because the cuttings in this batch weren't that much bigger, and I have extracted more resin from them than from all my extractions to this date combined. So I assume I was being very inefficient initially, as I have been seeing my yields progressively get higher.
I think my technique may be improving, because the cuttings in this batch weren't that much bigger, and I have extracted more resin from them than from all my extractions to this date combined. So I assume I was being very inefficient initially, as I have been seeing my yields progressively get higher.
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