I tested this in my little briar that I use for when I need to be away from the house for an extended period of time, for example, for work, or when visiting. After letting the pipe cool down and only then dumping, it is actually a lot drier than when dumping immediately after smoking. However, the only issue I have found with this is that the sides of the bowl has a lot more residue than you usually get in a pipe you smoke, dump and clean. If, however you only have one pipe with you, unless you have no choice, cool and then dump.