Carbon Fiber Brushes


I've worn out 2 of these in the last year. Is this normal? Please opine on the best brush out there.
jphii
I still have a Pickering CF brush that I bought in 1978. Bristles have gotten a bit soft but it still works.

What the heck are you doing with yours, sweeping the shop floor? I hear cocobolo sawdust is tough on CF brushes. <;~)
Which one do you have? I have the Hunt brush and have used it for about 3 years and it's still in very good shape. I do clean my records with a wet/vacuum cleaning system so the carbon brush is generally just taking very light dust particles off the top surface.