The Dryer's Lint Filter is used to collect lint during the dryer cycle as it passes through the dryer vent, in order to prevent damage to the machine. This manufacturer-approved part comes in gray, and is easy to install. It slides into the lint filter slot in your dryer. If there is visible damage to the screen then it's time to replace the part. We recommend that you thoroughly clean the lint filter before every load, but even with good maintenance, this hard-working part is often damaged or worn over time. If your dryer isn't drying quickly, the filter may be responsible. The manufacturer has made an authorized substitution to the lint filter. Due to the changes, the manufacturer suggests changing the filter guide, part # MEA4905001 and filter cover, part # MCK66787901.