The iRobot Roomba 980 comes with one spare side brush. I have to change to the spare side brush after one of the brush head of the original broke.
After changing to the spare side brush and scheduling it to clean just once, all the three brush heads broke. It is probably due to hardening of the rubber of the brush head that makes it so brittle.
The Sensu Artist Brush & Stylus was the 5th project I backed on Kickstarter, I backed it because I find the capacitive brush stylus interesting and I have not seen any stylus like that in the market before. The Sensu Artist Brush & Stylus consists of 2 tips, which is the brush tip and the rubber tip located at the opposite end of the stylus.
Backed the project on 22nd September 2011, it became officially funded on 21st October 2011 after raising US$65,823 (the goal was only US$7,500). The Sensu Artist Brush & Stylus was about 5 months in the making and I received the product on the 11th April 2012.