Mazda MX-5 MIATA 2003 Manual page 227

M Cleaning the Window Interiors
If the windows become covered with an
oily, greasy, or waxy film, clean them with
glass cleaner. Follow the directions on the
container.
CAUTION
Don't scrape or scratch the inside of
the rear window. You may damage the
rear window defroster grid.
Maintenance and Care
Appearance Care
8-49