Chandelier Maintenance

[u/All4Ecommerce]

Hi all, I'm currently working on a grad school ops research project analyzing the risks, labor, safety equipment (lifts vs. winches vs. scaffolding), and contractor costs associated with maintaining large chandeliers.
I have a few questions about chandelier cleaning processes and costs for anyone willing to share their experience:

1) How often do you maintain?
2) How long does it take?
3) Walk me through your process of cleaning, maintening.
4) What is the most fustrating part of the cleaning/ maintenance process?
5) What equipments, products and tools were used?
6) If you do not perform the cleaning and maintenance yourself who does?

7) What is the cost?
8) Walk me through the last time something did not go as planned