Use warm water and a bit of mild dish detergent to wash your jewelry items gently, and dry them with a soft cloth.
Alternatively you can use salt, baking soda & dish detergent:
• Line a bowl with aluminum foil and top with salt, baking soda, and dish detergent.
• Add hot water and drop in your jewelry, letting it sit for 10 minutes.
• Gently scrub with an old toothbrush.
• Rinse and pat dry with paper towel.