Cleaning:
To clean your piece I recommend using a micro fiber or other soft cloth to buff out solder lines and glass. Rest the piece flat on another soft cloth and don't apply too much pressure. A toothbrush is great for getting in crevices if needed.
House hold cleaning products are not reccomended. If a piece with mirror needs cleaning make sure it is an ammonia free mirror cleaner used and avoid spraying it dircetly onto the piece.
If any oxidation develops over time (commonly very small white bits creeping along solder lines) buff out with a toothbrush and microfiber cloth.
Looking to bring back it's shiny luster? You can apply a carnauba wax/polish (just enough to coat all surfaces) let that dry for a few hours then buff out again with microfiber cloth and your toothbrush for solder joints.
Please take into consideration all stained glass pieces are made with solder and came (border pieces) that contain lead. It is not unsafe to live with but you should wash your hands after handling and keep it out of reach of pets and children.
To hang your pieces DO NOT hang with suction cups. Hang only with secure nails or screws.
Not reccomended for use outdoors.