Using this filter is easy. First, turn off and unplug your Electrolux UltraPower ZB5000 Series handheld vacuum. Then, locate the filter compartment and open it. Take out the old filter and replace it with this new one. Make sure it fits snugly. When using the vacuum, don't overfill the dust container as it can put extra strain on the filter. For maintenance, it's a good idea to check the filter regularly. If it looks dirty, gently tap it to remove loose debris. You can also rinse it under running water (make sure it's completely dry before putting it back in the vacuum). This will help keep your vacuum working at its best and ensure the filter lasts longer.