Using this foam filter is easy. Just open the vacuum cleaner where the filter is located and place the foam filter inside. Make sure it fits snugly. When the filter gets dirty, you can take it out and wash it gently with mild soap and water. Let it dry completely before putting it back in the vacuum cleaner. Remember to check the filter regularly, about once a month, to ensure it's working well. Avoid using harsh chemicals on the filter as it can damage the foam. Also, keep the filter away from sharp objects to prevent tears. With proper care, this filter will last a long time and keep your vacuum cleaner running smoothly.