Hello, new to the forum. I started smoking pipes with my grand father and great uncle when I was younger but 7 years ago when my grandfather passed away I inherited his pipe collection. I’ve smoked them regularly since then and always clean and maintain them. I’ve noticed a dark spot on my main smoker but to be honest I think it’s been there for awhile. One thing I’ve always noticed is when I smoke this one it becomes extremely warm almost to the point where I put it down to cool off. Maybe I’m smoking it too fast. I usually smoke 2-3 bowls if I sit down to smoke. There’s a thin cake and the inside is well carbonized. So I’m wondering if this is a naturally dark part In the grain or the first signs of burn through. Thanks and happy to have found a forum to learn more!