Before you begin, make sure the water filter is clean and functioning properly. Aerators https://www.nivito.com are usually dirty due to a heavy buildup of minerals. Basic cleaning with a rag will remove small smudges. However, if the buildup is serious, you'll need to use abrasive cleaners. If you're using a store-bought cleaning solution, it's OK to use Formula 409, Windex, or Fantastik. However, make sure to wear protective clothing so that you don't get dirt or bacteria in the drain.