As i stated earlier i feel its very important. I would say there are a lot of excellant shooting guns out there being sold that just need a good cleaning. I first come on to cleaning and barrel break in in the late 80's reading a catalog from Fred Sinclair. Fred's catalog was more of a instructional book than a catalog, he went over every item of how and why to do. As soon as i read thru i grabbed the phone and started ordering dewey rods, solvents, bore guide, etc. As a regular every day hunter ah clean the gun inside every 5 years was okey. Ever since i have done the the single shot clean method as mentioned from the other posts and worked well.
Mike