a trick the Rokon guys taught me is to throw the muffler in the gas grill, or woodstove to burn out any crud, bees, nuts, mouse nests etc. it also does a great job getting out the caked on burnt reminants of 2 stroke oil. back when everyone ran 20W oil it would cake inside the muffler and on the rokons plug them up so that there was way too much back pressure. one nice thing about all the oil inside, it it helped keep the muffler from rotting out so bad. my Rokon muffler was so plugged that you couldn't blow air through it... an hour in the woodstove and it flows quite nice.
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.