Cut a piece of aluminum foil that roughly covers the bottom of a small bowl (like a cereal bowl).
Pour hot water into bowl. Place salt, soda, and dishwashing liquid into bowl. Place jewelry on top of foil and let it sit for 5 to 10 minutes. Rinse jewelry in cool water and dry jewelry completely with soft cloth. Discard solution after use and make a new batch next time.
Recipe by At Home With My Honey at http://athomewithmyhoney.com/diy-jewelry-cleaner/