Using this inner filter is easy. First, make sure your vacuum cleaner is turned off and unplugged. Then, open the filter compartment of your Rapido or Electrolux vacuum. Remove the old filter, but keep the filter frame base as you'll need to reuse it. Insert the new filter into the frame base and place it back into the compartment. Close the compartment properly. As for maintenance, it's a good idea to check the filter regularly for dirt and debris. If it looks dirty, you can gently tap it to remove loose particles. However, if it's really clogged, it's time to replace it with a new one from this pack of 2. When handling the filter, be careful not to damage it. And always remember to follow the safety instructions in your vacuum cleaner's manual.