Avoid contact with perfume, lotion, hairspray, soap, salt, chlorine or any other fluids and chemicals. Take off your jewelry when washing hands, bathing, doing household tasks, sleeping, tanning, going to the beach or doing sports.
Clean your jewelry softly in warm water and let it dry well. Or even better just gently wipe with a soft jewelry cloth.
Store and protect your jewelry when not in use in an air-tight bag or jewelry box.
Keep it away from sunlight and humid spaces like the bathroom.