Shortly after purchasing my Herbie, I bought some
Vapir cleaning brushes recommended on the EVO forum. I don't have the EVO anymore, but I love the cleaning brushes for use in my Herbie bowls.
The end of the brush cleans the screen at the bottom of the bowl and the sides of the brush get the bowl sidewalls. The braided metal handle is easy to twist between your fingers to rotate the brush in the bowl.
I snipped the last inch or so off my brushes so I also have an effective stirring and poking tool at the other end. It's everything I wish the Herbie brush was for only $2 a brush at full price.
For those who prefer something more like the stock Herbalizer brush, I also really like the Magic Flight brushes. They last a long time and and the wood handles are nice to use.