Hanging: I recommend hanging your piece from a sturdy hook that has been screwed into a secure material, like a wall stud or wooden window frame, or hang on to your window latch – something that isn’t going to fall down.
I NEVER recommend suction cup hangers attached to windows as they are not secure and pose a big fall risk. These are glass products and will break if they fall. The repair for your glass item can be costly, so save yourself the trouble and make sure you hanging it securly.

Cleaning: Do not use Windex or other glass cleaners. If your solder lines get a white substance on them that is normal.
From time to time, solder or lead will oxidize and leave a whitish substance on its surface I use a very small amount of Clarity Wax or baby oil to a lint free micro-fiber cloth and wipe until lines are nice and shiny and the glass isn’t greasy.
You do not need a lot of products to make it look like new again. Do not use anything abrasive on your stained-glass piece as you can scratch off the patina or scratch your glass.
-
Wash hands after handling stained glass products. Stained glass products are made with 60/40 Lead Tin solder.
-