Using your K&N Universal Air Filter is easy. First, find the right spot for it on your equipment according to the air intake requirements. Make sure the filter is properly aligned with the intake and use the rubber flange to secure it in place. If it's a bit tight, you can gently stretch the flange up to 1/16 of an inch (1.5mm) to fit. When it comes to maintenance, it's recommended to clean the filter regularly. You can wash it with a mild detergent and water. Let it dry completely before reinstalling. Avoid using harsh chemicals as they can damage the filter. Also, check the rubber flange for any signs of wear or damage over time. If you notice any issues, it might be time to replace the filter to keep your equipment running smoothly.