That's what i figured it was Snaps. Thats also why i poured off the milky water into another pyrex, since if there is oil in it i won't lose it.Water from your ethanol is what's making the milk due to the oil mix. I let mine evap, there's oil suspended in that water.
Never evaporated on ptfe... just pyrex or stainless.
I think it looks pretty good.i think i may have let the heat get a bit too hot at the end