Acetone is fine.

This is actually one of my pet peeves. Acetone is far from the “universal plastic solvent” that it has as a reputation…

Ultem, aka pei actually does great with acetone: https://www.astisensor.com/ultem.pdf.

I use acetone pretty regularly on my sheets and I haven’t noticed any bad effects. Usually it is best to use soap and water, acetone and isopropyl alcohol. If things won’t stick, do all three (in that order).