I finally have that double wall pipe and damper I've always wanted. I should have done it 10 years ago. I feel much more safe letting it burn a bit hotter and have bought myself at least 50 degrees of extra soapstone temp from when I had the single wall. It's time for a mid season cleaning. My question is, how do you clean pipe that has a damper in it? I used to just run my steel brush through the old pipe which obviously won't work anymore. What's a girl supposed to do?