Always wash your hands after handing it. Never allow children to handle stained glass due to possibility of lead poising.
For inside display only it looks best in direct sunlight. Clean stained glass with glass cleaner and lint free towel or paper towel. I no longer recommend using suction cups on any size of stained glass. Over time the suction will release, and the piece will fall, possibly causing damage to both the glass and the surface it falls on.