*sigh* I've never agreed with the excessive amounts of naphtha used in many of the teks.  I never use more than 300mL at a time when extracting a kilo.  Usually I will only use 100mL at a time.  I do more pulls this way, but never have to evap a thing.
Anyways, yeah you can make a solution of say 200mL water, add some acid (doesn't really matter, but vinegar would work nicely) mix with naphtha, shake for 10 minutes or so, seperate, add a small amount of lye (like 1/2 tablespoon) to the acidic water and re-extract with 50-100mL naphtha (preferably the same naphtha you just extracted from).
I would guess that there is still quite a bit of spice left in your basified jug.  Pour in 50-100mL naphtha, stir for a while, seperate and freeze that.  I imagine you will come up with some xtals.
 The Spice extends life
 The Spice expands consciousness
 The Spice is vital for space travel
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