If you use a reamer, go slow and careful if you do not have some experience. A reamer can do a job on briar used too energetically. You can avoid cake by wiping out the bowl after each smoke with a paper napkin or paper towel, after scooping out the ash. This will maintain a very thin carbon layer, which is all you need, and also keep the chamber full size. A number of members do this and it works fine.