Hi Dano,
Thank you for your review of the Delta Faucet model RP50781SS. Please accept our sincere apology for the inconvenience you are experiencing with the soap dispenser. We are happy to help.
As the manufacturer, we are committed to supplying you with a quality product that delivers the expected performance. Our stainless finish should not be damaged from indoor UV exposure. Nonmetallic parts are used to ensure a long-lasting, high-quality product.
Please reach out for assistance with the issue or with any questions!
Best Regards,
Bryan
Digital Communications Specialist
(800) 345-3358
customerservice@deltafaucet.com