"Chris" wrote in message
so I washed it with Windex and wiped with a paper towel....
This destroyed the screen coating, null and voided the
warranty.

Cripes, what an idiot. Anyone with half a brain knows not to use Windex
anywhere near a boat. That and never to use paper towels on a plastic
screen. You screwed up on both counts. Now you want to blame Garmin? No
way. If anything you better hope they offer some sort of decent refurb
program to 'clean up' your blunder.