How to get rid of Bondini residual glue ?

I would try polishing the plastic window since you have nothing to loose.

My guess is the plastic is not coated by the glue, but partially dissolved by it. Cleaning won't work, the glue is not just lying on top.

Any solvent that attacks cyanoacrylate will probably make the plastic worse. Too bad it's not glass, it would be unaffected.

The best product is Polier' which is made by Flitz. Problem is, Polier' is very difficult to find.