Using your K&N Universal Air Filter is easy. First, find the right spot for it based on your equipment's air intake. Make sure to connect it firmly to the intake using the rubber flange. 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, check the filter regularly. Once it gets dirty, you can wash it. Use a mild cleaner and water, then let it dry completely before putting it back. Avoid using harsh chemicals as they can damage the filter. Also, make sure the filter is dry before reinstalling it to prevent any issues with your equipment.