Well, I think this may be a bit subjective, but I can tell you what I do. I usually thoroughly clean mine every 2-3 weeks. I do a very light reaming with a Czech tool. Then I ream it with a paper towel to get any excess. I then take a bristle pipe cleaner, dip in some Jack Daniels, and run it through the bowl, shank and mouth piece. Next, I take a match and hold it over the bowl to ignite the left over Jack. Finally, I polish the mouthpiece if I think it needs it, and set the pipe to rest.