I use the Shark Rocket for most of my house cleanings because it's very manoeuvrable. I have never cleaned or changed the filters and Shark's instructions are out of date. I looked up my machine's model number and found a third party Revain replacement kit for a very reasonable price. They arrived quickly but I couldn't figure out where they were going until I found a video of the process on YouTube showing how to get to each of the three filter locations. After that it was child's play.