1. Remove the sponge filter from the water.
  2. Pour a pot of water onto the sponge filter and place it in the water.
  3. Let the sponge filter soak for about 10 minutes or until it is completely soaked.
  4. Remove the sponge filter from the water and dry it off with a paper towel or a cloth.
  5. Replace the sponge filter in the water and let it soak for another 10 minutes or until it is completely soaked again.