Cleaning your stud earrings at home is simple; all you need is soap and warm water. This is a good and effective way of taking care of your jewelry. Just like soap and water are used to remove dirt from everything else, this combination works on diamond stud earrings, too. Simply mix about four cups of water and a spoonful of washing detergent or liquid dishwashing agent in a large container. Dip your stud earrings in this solution, gently rub them, and clean them with a soft cloth. You could use your finger, too, to clean your diamond stud earrings. Once it has been cleaned, take it out of the water and gently dry it with a cloth. Now spread a soft piece of cloth, spread the stud earrings on it and let it dry with in air and light. Make sure that the entire soapy residue is gone, as this can leave a film or marks on your earrings.