Mix 2 parts baking soda with 1 part water to form a paste
Apply the paste gently to the jewelry with a soft cloth or soft toothbrush
Rub lightly, especially in crevices and around settings
Let it sit for 1 to 2 minutes if needed
Rinse thoroughly with lukewarm water
Dry completely with a soft lint-free cloth
Repeat only if necessary
Avoid using baking soda on pearls, opals, emeralds, or soft gemstones
Avoid using on plated, antique, or delicate jewelry
Test on a small hidden area first if unsure