So, I had to use some waterless kitty shampoo on my Lucky after he got particularly messy after a syringe feeding session. Part of the instructions involved brushing it out after it dried. I was SO happy to have this brush. The hair was all yucky and felt kinda matted after using the shampoo, and of course this yucky sticky hair was all in the brush. Yuck! But to clean it, all you do is press a button on the back, the bristles all retract, and you just wipe the hair off. Done!