To use this inner filter, first make sure your vacuum is turned off and unplugged. Open the vacuum cleaner to access the old filter. Remove the old filter carefully and replace it with this new one. Ensure it's properly seated. As for maintenance, check the filter regularly. If it looks dirty, it might need cleaning or replacement. Remember, this part (2198213015) is no longer available, so use EF142 as a replacement. When handling the filter, be gentle to avoid any damage. If you have any other questions, feel free to contact us.