Review on iRobot Authentic Replacement Parts - Roomba s Series High-Efficiency Filter, Set of 3 by Karla Matthews

Overall the Roomba iRobot is great (I have an s9+). But these filters are small and clog easily, and almost impossible to clean well. If you have a pet or your home is frequented regularly, you might as well change these filters once a week. Roomba really needs a washable "pre-screen" on their machine before air can get to those non-washable filters.