You have my sincerest envy. I can't even get cake to build in briars. I'm thinking I may smoke too slowly. Even the oldest new briar I got in '92 shows little sign of it and I've never used a reamer or sandpaper on pipes I've bought unsmoked.
The briar from '92.
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This fellow didn't get this dark from seldom smoking it since 2020.
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But little to no buildup and I can't blacken a meerschaum rim to save my life.
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I have noticed that wet aromatics dissolve what buildup I've had though.
I also smoke slowly, just barely lighting, a few sips, then let it go out and cool, down.
My Radice Rind Straight of two years has no cake build up, and not even a 1 mm layer of carbon too throughout the entire chamber after two years. I’m still trying to get a nice layer all they way through, it’s only somewhat formed on the top half.
I also notice, when I’ve smoked about 3/4 of the bowl, if I have to much fire, and smoke it a little to much with only 1/4 bowl left, I always get, what I would describe as a Deep Stewed Cherry flavor from the briar. Which makes me wonder, because the wood doesn’t have a good carbon layer, so possibly the reason(s) for tasting briar towards the bottom. hmm
So, when I get to the last 1/4, so I can still smoke/enjoy the rest, I make sure to light even less, and puff even slower so I don’t get this taste.