Hi Songbird,
I am sorry to hear about the finish issue you are experiencing with the faucet.
Always blot dry any water from faucet surface. Allowing water to evaporate on the surface can lead to build up of mineral deposits. Cleaning with a damp non-abrasive sponge and buffing it dry with a clean soft cloth should help keep your product looking beautiful. To remove water spots, use warm water and a soft, damp cloth. Hard water stains may be removed using a 50/50 solution of white vinegar and water. Make certain that you rinse thoroughly with water afterward.
Thanks,
Tim