Review on Mochenli Replacement Parts Kit for iRobot Roomba i7 i7+ i6+ i8 i3+/Plus E5 E6 E7 Robot Vacuum Cleaner - Includes Rubber Roller, Filters, Side Brushes, Dust Dirt Disposal Bags, Replenishment 25-Pack by Doris Allen

I bought this set for my Roomba i7 and it's great except for the dark green roller. I exchanged the dark and light green stripes as soon as I received them. The light green is fine, but I've had to replace the dark green TWICE in less than a month. The end coming to the holder breaks off, is lifted and then breaks off. Not sure what is causing this. It doesn't get clogged with hair or anything since I clean it every day.