Leaded glass, commonly referred to as stained glass, is a type of multi-colored glass with colors separated by a thin lead layer. When cleaning this glass, it is important to use a safe cleaning technique that will remove residue and dirt without damaging the colored glass. Abrasive commercial cleaning products will eat through the color, but you can make your own mild cleaning solution.
Wipe the glass regularly with a feather duster to wipe away dirt as it accumulates.
Mix your homemade solution by pouring 1/2 gallon distilled water and 1 tbsp. mild dish detergent in a bowl. Distilled water prevents harsh tap water chemicals from coming into contact with the glass, while the mild detergent will safely remove residue.
Dip a soft microfiber cloth into the cleaning solution, then wring out as much excess moisture as possible.
Gently wipe the damp cloth over the leaded glass, and continue until you have cleaned all of the glass.
Allow the surface to air dry.