I don't tote my pipes much except for travel. Definitely take pipe cleaners along. On rare occasions, use them mid-smoke, for gurgles or airway obstacles, but they usually clear things up quickly. Use pipe cleaners after every smoke or sequence of smokes in the same pipe at the same time. I'm not a cake builder, so I wipe out the bowl with a paper napkin, towel, or tissue, leaving just the thin layer of carbon. This keeps pipes clear over years, decades; there is a small but devoted coterie of Forums members who take this approach. The erstwhile member roth followed this regimen, he of the many thousands of posts.