There was a guy who bought a pipe and reamer at The Briary, and was so excited about building up the cake so that he could ream it. I don't get the excitement about cake. Well, I remember when I first started, I was curious about why it was taking so long to build up cake. But, as the years pass by and I smoke slower and slower, I have developed a loathing for cake. The slower you smoke the faster the cake builds, and I don't need insulation for the briar. I prefer the clean taste of tobacco with a slight aroma of the warmed briar over nasty carbon build up.
With a slow style and thin walls on the pipe, I don't worry about heat. Paradoxically, cake builds up faster, so I keep the pipe reamed with a paper towel, occasionally still having to scrape it back to wood with my pocket knife. If you want cake faster, smoke in a way that will make the cake unnecessary, ha ha. I think that if you puff and smoke faster and hotter, cake might benefit you more, but will take longer to form. This is best for those who only get to smoke a couple of times a day or less, and don't get the practice in smoking slower. Like I said, a paradox.
But, don't rush it. It's not going to be a ticker-tape parade where the pipe magically smokes better, IMO. I see it as buying a new car and being anxious about the first tune up. Just enjoy it the way it is. The cake will happen, rain or shine, for better or worse.