Using this fine filter for your Simpson or Westinghouse dishwasher is a breeze. First, make sure your dishwasher is turned off and unplugged. Then, locate the old filter and carefully remove it. Take your new white fine filter and place it in the same spot where the old one was. Ensure it fits snugly. Now you're ready to start using your dishwasher again. As for maintenance, it's a good idea to clean the filter regularly. You can do this by taking it out and rinsing it under warm water to remove any debris. If you notice any signs of damage or excessive wear, it might be time to replace it. Before purchasing, always double - check the compatibility with your dishwasher model. If you have any questions, don't hesitate to reach out to us.