To use these earrings, simply open the earring back and gently insert the post through your earlobe, then close the back. As for care, keep them away from harsh chemicals like perfume and hairspray. You can clean them with a soft, dry cloth to maintain their shine. If you notice any signs of tarnish, you can use a mild jewelry cleaner. Remember, since they're for sensitive ears, avoid wearing them if your ears are already irritated or infected.