I have too many pipes by any sane assessment, so I'd just grab another. However, my dad always smoked just one pipe at a time until burnout, and clearly thought that by the time he knocked out the ash and repacked, the pipe would be cool enough, and he got pretty good mileage out of briar pipes, maybe a little less good out of cobs. Either works, but if you have a few pipes, or a few score, I'd just pack the next one.