I have 2 questions about caking. 1) I recall reading somewhere once you finish a bowl, don't dump the ash. After it has quit burning, cover the bowl with your thumb, turn upside down and shake to cover entire bowl with ash and let it stay there, then dump ash. It is supposed to help formation of cake. Opinions? Also at the end of the day when I clean the 2 pipes, I fold a pipe cleaner over my finger to form a U and then use that to clean the sides of the bowl of any loose material. Good, bad or indifferent? These pipes will rest 5-6 days before being smoked again. 2) I notice that some bowls have slightly thicker cake on the top half of bowl. Should I ream it back to uniform thickness, or just smoke half bowls until it evens out?