Using this Panasonic exhaust foam filter is easy. Just install it in your MC - CG522 barrel vacuum cleaner according to the instructions. When using the vacuum, make sure the filter is properly in place to get the best cleaning results. As for maintenance, check the filter regularly. If it looks dirty or clogged, it's time to replace it. It's best to replace the filter 1 - 2 times a year to keep your vacuum working at its best. Always store the filter in a dry and clean place to avoid damage. And remember, with our 25 - year - long experience in supplying parts, you can trust this product to meet your needs.