Plated jewelry has a surface layer over another material, and that layer can gradually change with wear. Friction, moisture, cosmetics, and contact with other items may all affect how long the finish looks its best. The exact care needs depend on the piece, so read its product information rather than assuming every plated item is made the same way.
Put plated jewelry on after lotions, fragrance, and hair products have dried. Remove it before swimming, showering, exercising, or doing chores that involve chemicals or repeated rubbing. After wearing, gently wipe the piece with a soft cloth and store it separately. Avoid polishing cloths or abrasive cleaners unless the maker specifically says they are appropriate.
Some change in appearance may happen over time, particularly on frequently worn items. Care can slow wear but cannot make a surface finish permanent. If you notice a change, stop using strong cleaning methods and check the care guidance. Choose pieces suited to your routine: a favorite for occasional wear may need different expectations from jewelry you plan to wear every day.