A clean piece of jewellery is a piece for all time. Your jewellery will always last longer and radiate with proper care. Soap can cause a film to form on jewellery, dulling it.
Many commercial cleaners are available to clean jewellery at home.
You will find a soft chamois cloth to be very effective and inexpensive way to keep your jewellery lustrous. Be careful of chlorine. Chlorine, especially at high temperatures, can permanently damage or discolor your jewellery. Do not wear gold while using chlorine bleach or while in a pool or hot tub. You can remove tarnish with jewellery cleaner, or by using soap and water mixed with a few drops of ammonia.