* To prevent metal costume jewelry from tarnishing, store a piece of white chalk with it.
* To avoid tangled necklaces, hang them from adhesive-backed plastic hooks on your dresse
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r mirror or from a tie rack on the inside of the closet door.
* Make a necklace from fishing swivels. String them together with a satin cord, knotting the cord between each swivel.
* To clean nonplastic costume jewelry, immerse it in rubbing alcohol for five minutes. Then rinse in warm water and dry with a lint-free cloth. Soak rhinestone pieces in straight liquid detergent for 15 minutes; rinse in warm water and dry with a flannel cloth. Do the same for metal jewelry, but dilute the detergent with warm water.