Care of your stained glass piece 
Stained-glass works are beautiful but fragile and they do require special care. The Stained Glass Association of America recommends minimal cleaning.
- Simply dust most of the time and when needed wipe clean with a soft, damp cloth. It's best to use distilled water only -- hard water could spot the glass.
- Don't over-wet the cloth, spray the glass, or allow water to leak between the glass panes or window seams.
- Don't use scouring pads, steel wool or anything that contains ammonia or abrasive cleansers.
- Apply the wax onto both sides with a soft, lint free cloth. An old toothbrush can be used to apply the wax in corners and seams.
- Allow a moment or two of drying then
wipe it back off with a clean, non-abrasive cloth.
- Use a different old toothbrush to remove the wax from the corners and hard to reach areas. Wooden toothpicks may be carefully used to make sure all the lines are thoroughly cleaned.
- Buff the piece with yet another clean cloth.
*http://www.nanglass.com/CareClean.html
