Water deposits build up around faucets and drain areas. Use a paper towel soaked in white vinegar and place around the faucet. Plug the drain and pour 1/2 cup white vinegar in the sink and wait. It takes time for the white vinegar to dissolve the alkaline deposits. Scrub using a stiff bristled nylon toothbrush.
Do not use orange based or powdered cleansers on brass or gold plated faucets. These fixtures corrode and scratch quickly. Dry these faucets after each use to prevent water spot damage.