This article is from the Piercing FAQ, by Anne Greenblatt with numerous contributions by others.
Other Soaps
Other soaps, such as brand names Clearly Natural, Dr. Bronner's,
Neutrogena, have been successfully used by many people to cleanse
piercings. However, these soaps do not contain clinically proven
antimicrobial ingredients.
Saline Solution
Saline or an isotonic solution (0.9%, or 1/4 teaspoon table salt or
sea salt per 8oz distilled water) may be used as often as desired but
should not be solely relied upon for cleaning. Prepackaged saline is
preferable to homemade solution because it is sterile. Do not use
saline solution containing enzymes, cleansers, or disinfectants.
Soaking the piercing in warm salt water or using a warm salt water
compress helps remove dried discharge and lymph secretions, relieve
itching, and increase circulation to the piercing. Use 1/4 teaspoon
sea salt or table salt per 8 ounces of water. Table salt and sea salt
are both sodium chloride and essentially the same; table salt simply
contains ingredients to alter the taste and improve flow in
cooking. Epsom salt is hydrated magnesium sulfate and should not be
used.
 
Continue to: