All stained glass pieces should be installed with 1 inch eye hooks screwed directly into your window pane. Suction cup hooks and mug hooks are not recommended.
To clean, simply use a dry, soft, clean cloth.
If you need a deeper cleaning, lightly dampen your cloth with distilled water.
If you still need more cleaning power, use only an ammonia-free, vinegar-free, non-abrasive, PH-neutral cleaner. This is extremely important, as chemicals can damage your glass work's finish.