How do the cob smokers out there clean the cake buildup on their cobs? Do you just use a knife or a pipe reamer? This may sound foolish but I really do like to take good care of my cobs and need a little advice on any other maintenance needed for them. I have a few of my cobs that I have been smoking for nearly a year now and they are getting a buildup in them. I know they are cheap and I could just buy new ones but I don't see any reason if I can keep on smoking these. I do still have the 1st cob I bought in Nov 2012 when I took up pipesmoking full time and I really want to see how long it will last.