To preserve the golden luster of the bronze brooch in the long term, it should be regularly wiped with a soft, dry cloth to remove skin oils and dirt. For heavier tarnishing, cleaning with a special metal polish for bronze or soaking in a mild citric acid solution is suitable, after which the piece must be thoroughly dried. Storing it in a dry place, such as a jewelry box or an airtight bag, minimizes contact with humidity and sulfur compounds, which further slows down oxidation.