Using this Westinghouse rangehood filter is easy. Just remove the old filter from your rangehood and slide this new one in place. Make sure it fits snugly. As for maintenance, it's a good idea to clean the filter regularly. You can soak it in warm, soapy water for a while and then gently scrub it to get rid of any grease or dirt. Avoid using abrasive cleaners as they might damage the filter. If you notice the filter is very dirty or damaged, it's time to replace it. This way, your rangehood will keep working well and keep your kitchen air fresh.