Best to act the role of maintenance method is wearing every day, because the human body oil will make a warm silver necklace hair natural burnish (of course some exceptions, someone of sweat in itself contains silver black components) don't usually wear to receive well, better use the airtight pockets for good, prevent silver surface contact with air and oxidation black. Daily cleaning: a squeeze in toothpaste on silver, some more water, proper work it into small white bubbles up, then rush clean with clear water then can resume shine.