How do you clean a sunburst?

Many years ago I watched a crew from the Dale Chihuly studio hang the hundreds of blown glass spirals which make up the sunburst which hangs high above the entrance hall at the Minneapolis Institute of Arts.

As a result I have always had a soft spot for the piece, even though given its weight and fragility I have always found it a little scary too.

So it was a delight to see the MIA posted pictures of the annual sunburst cleaning. You can find it here, but here is a sample:

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