There she is, the enemy of my Roomba. Oh, she may look cute enough, but she sheds like dandelions in the Spring. I've had my roomba 530 for years, upgrading the battery and the vacuum. Every year or so The Enemy wins and the thing totally chokes up.
I have to take it apart and clean out the brush gears. It's quite an involved job and I only recommend it for people who used to take apart old clocks when they were kids. (These modern kids will never see gears). All that gunk is cleaned out, greased, and put back together again. Now it's ready to faithfully chase the dog around the room cleaning up all the fuzz.