Things You'll Need
Instructions
Examine the crystal and make sure that it is free of particles and debris.
Apply a small amount of brass cleaner to a clean rag.
Rub the polish rag against the face of the watch crystal, lightly but vigorously. Try a circular motion first, then rub along the grain of any stubborn scratches. This should fill in most scratches in the crystal.
Wipe off any excess brass cleaner with a rag, then wipe the face of the watch using a wet cotton washcloth. This will ensure that there's no residue left on the watch crystal. Be sure that the crystal is immaculately clean. Any leftover cleaner on the crystal can attract grime and interfere with the clarity of the watch face.