I have used 'Rain Wizard' plenty of times in the past and it works wonders. Put some on the Vectra and it has made such a mess of the screen, smearing with every wipe.
I have tried AG Glass cleaner, MER glass cleaner and even vinegar to remove this mess but still all I get it smears with every wipe. Not only is it annoying but IMO is dangerous.
Short of getting a new screen from the insurance, is there another way of getting the screen totally clean.
BTW, I do not have a machine polisher, just an elbow full of grease.