Keep it dry and clean, wipe with a clean paper napkin and store in a box when not worn, that's it! My brass/nickel silver jewellry is coated with bees wax while heated to protect the surface from things like sweat penetraring pores, but it still requres careful cleaning for best maintenance. It can still dull a lillte bit when not worn and may show some little brownish spots, but the pieces shown here are often already tarnished (inbetween making and taking pictures it's been exposed to the sun), so that's the realistic look of brass jewelry. It's not perfect and it wasn't supposed to be.