Frosting is a thin layer of paint that manufacturers apply to glass to make it opaque. It is common on bathroom windows or shower doors. Sometimes, homeowners apply it themselves and use stencils to make a design out of the frosted glass. The frosting may begin to peel and you'll need to remove all of it and respray it. Use a razor blade to scrape off the frosting. This will take more work if the frosting was applied professionally during the manufacturing process. If you applied it yourself, it may not take very long to remove.
Spray the glass with glass cleaner. This will help lubricate the surface so you don't scratch the glass.
Scrape the frosted glass off with a sharp razor blade. Sharp razor blades are less likely to scratch the glass.
Rinse the blade when it becomes covered in frosted glass. Wipe the glass to check your progress. Re-wet the glass and continue using as much glass cleaning solution as needed to keep it wet while you are working. Use a new razor blade once the one you are using starts to drag across the surface. This means it has worn out.
Scrub the glass with a piece of superfine steel wool to remove any pieces of frosting left over.
Spray the glass with glass cleaner and wipe it down with a clean cloth.