Using this CleanStar Stellar 2 - in - 1 vacuum cleaner upper filter is easy. First, turn off and unplug your vacuum cleaner. Then, open the filter compartment and remove the old filter. Place the new filter in the compartment, making sure it fits snugly and the seal is properly in place. When using your vacuum, try to avoid vacuuming up large or sharp objects as they can damage the filter. For maintenance, check the filter regularly. If it looks dirty, remove it and gently tap it to remove the debris. You can also wash it with lukewarm water and mild detergent, but make sure it's completely dry before putting it back in the vacuum. Replace the filter every few months or as needed for optimal performance.