Using your K&N Universal Air Filter is easy. First, find the right spot for it based on your equipment's air intake. The rubber flange helps it fit securely. When installing, make sure it's in the correct position and firmly attached. As for maintenance, you don't need to replace it often. Instead, when it gets dirty, you can wash it. Use a mild soap and water, gently clean the filter, then let it dry completely before putting it back in. Remember, avoid using harsh chemicals as they might damage the filter. Also, check the flange regularly for any signs of wear or stretching, and if it seems loose, adjust it to ensure a tight fit.