"meuharris" wrote in message
...
My chimney is a very old and wide.
I suspect that the brush I use may not be contacting the sides of the
chimney.Is this likely and can I get a wider one or use another
technique?

I believe they used to pull a hollybush branch through (letting a stone down
on a rope, attaching the holly branch and then pulling it up from the top).
That, or a small fir tree.