I own a roomba and while its cool and saves time and everything, cleaning the counter rotating brushes inside it is bothersome. I have long hair.
I usually open the roomba and remove the brushes, then sit at my desk, the dustbin between my legs and try to grab some hair from it and pull it out.
I've tried applying a paperclip as hook but it didn't help. I tried a nail scissor but its to large to fit inside the smaller parts.
Especially the small gaps are difficult (in the above image the upper brush has one very small gap on the right side. This part is full of my hair.
Note: It takes me about 15 - 20 minutes to clean both brushes. That is okay, but I would prefer it to take about 1 - 5 minutes.