I finally tracked down the maker of these crystals, and even with regular cleaning help, I don’t think I’d feel comfortable asking my housekeeper to climb a ladder, and with a long arm duster I think the cords would get tangled... first world problems, I guess...

The mall uses a lift to clean their "tree" leaves. It jacks them up to height and they wipe the leaves down. Their leaves are metal, I think, but seems like that would be the safest technique.

Nice! Just like the Met!!

I have several crystal chandeliers. I stand on a ladder and clean them with paper towels sprayed with Windex one crystal at a time. It takes a while.

This reminds me of the old design maxim: Less is more.

I'd be using a leaf blower from the floor level.

Very carefully and when you have a extra day in your schedule.

There are sprays meant for cleaning crystal chandeiers , pretty sure would work for these and BTW your cleaning lady better not climb a ladder unless you have awesome insurance to cover her. Most cleaning companies will not allow their employees to clean anything they can’t reach from the floor. The sprays work well I use one on my chandeier about 3 x a year you need to make sure the floor under the piece is covered since the spray drips onto the floor.