Acetone is used to clean E and meth up since rubbish is soluable in acetone and E+meth only very very slightly(ever done a "freezer-pull'?!)
You're observance was as it seemed and your vision clear in what you saw.
When it comes tocookin' dope acetone is paramount in inclusion to the precursors of "dopey

dreams"
Wear resistant gloves though!
Shit causes cancer and comes through the skin if exposed together.