Tree sap on acrylic windows removal!

WD-40 or even olive oil works. As I understand it, the other technique of rubbing alcohol (or hand sanitizer) is not recommended for acrylic.

@CanadianTabber, try "Goo-Gone."  I used it to remove some stickers from the acrylic windows when I purchased it (in 2019) and use it on the aluminum body to remove tree sap.  If you're not sure, test it first on an inconspicuous area of the acrylic window first.