Your Edge-Sweeping Brush needs to be replaced about once a year. Use this guide to learn how to replace the Edge-Sweeping Brush on your Roomba i7. What is the Edge-Sweeping Brush?
If you can hang a picture, you're overqualified.
iRobot has been manufacturing the Roomba sweeping robot since 2002! They have manufactured multiple variants and even a line of mopping robots.