Hey everyone. So my MM Cobs and goodies showed up today. These are my first pipes and I'm looking forward to trying them out. I've read about the 'rule of thirds' or something along those lines. Is it necessary to break in a cob a third of a bowl at a time? Also, what about trying different tobaccos? I ordered two pipes and a sample pack of five different kinds of tobacco. Dare I smoke one then the other or should I go through a bag and then clean the pipe before I try the next blend? One more question. Any tips for cleaning? Sorry for all the questions. Just a noob tryin to get the basics down. Thanks!