No abrasives needed. Not recommended for any jewelry with stones AND cautions against using it on antique silver. Place aluminum foil in heat resistant glass or ceramic. Place pieces on foil but not touching each other. Add two heaping tablespoons of baking soda to the very hot water until it begins to bubble. Allow the silver items to soak in the baking powder mixture for about 30 minutes. Remove the silver pieces from the water. Rinse well, making sure that all of the baking soda is removed from the crevices of the silver items. With a soft clean lint free cloth, rub dry and remove easily removed tarnish. Re-apply with new materials for resistant still tarnished sterling.
Sorry that sounds almost indecent ! An ear nut is the small part, or finding, that is used to hold a post or stud against the ear. The ear nut that you can tighten to avoid earring loss, a side view of it, looks like two curls touching in the middle. The middle is where the post comes through and the two curls press against it will some pressure. After being applied and removed many times ear nuts can become loosened. All that is needed is to place an index finger and a thumb against both curls and press them towards each other. Make sure the post is not in place when you do this. Then try to place on the post. It should be more snug than before tightening.