Ngl I brushed the wrong way on every flue for 2 whole seasons
So last Tuesday I was on a job in Daytona, an old brick ranch with a wood stove insert, and the homeowner watched me brush the flue and goes 'that's not how the last guy did it.' I laughed it off at first. But then I tried it his way, brushing top down with a little back and forth twist instead of just jamming the rod straight, and the amount of creosote that came loose was insane, like a whole coffee can of junk. Turns out I'd been pushing soot down onto the smoke shelf for years and calling it clean. I pulled my camera down after and saw bare brick for the first time in that house. Now I'm wondering how many chimney fires I left behind in folks' homes without knowing. Any of you learn the top down twist trick the hard way too, or did someone just tell you early on?
I used to figure a quick straight push was good enough since the brush was making contact either way, but seeing how much more comes down with that twist changed my mind fast. Pushing all that junk onto the smoke shelf just means it sits there waiting instead of getting pulled out, and you'd never know it without a camera. Your post is making me rethink every job I walked away from feeling good about.