mineral spirits as it could damage the plastic ('glass'). Better
to use the 90% plus ethanol.

Alcohol can cause acrylics (perspex) to craze. Something you won't like in a
windscreen, so if it's perspex (and possibly lexan) rather than glass, don't
use alcohol.

I used it on one of the perspex housings on one spark machine at work and it
does craze it!!!

Peter