I was under the impression that naptha evaporates pretty quick but im 7 hours in on a little tester puddle with very little evaporation.
I opened a new bottle, poured a little off the top in a glass cup, pretty much just checking if it evaporated off clean... and the little puddle has barely done anything.
Its kleanstrip vmp naptha and i wasnt using a fan.

I found it evaps a lot faster in a shallow baking dish, with a fan...

Shallow dish or just increase your surface area. Although stay safe: those fumes will be flammable and toxic.

Why no freeze precip? Soooooo much easier and better yield imho, and safer presumably.

Ya ive been using the freeze precip method but at the time i wanted to check my naptha, just to see what was left over after it all evaporated.
I didnt realize it took to long to evap. But ya shallow dish and a fan seems to be the way to go
Thanks for the responces!