If yer cloggin that bad, I would yank the baffle....once it gets that gunked up, removing it does nice things for the performance, and the more "aggresive" exhaust note is quite charming too.
Remove the little flathead screw on the very end of the exhaust and use some vice-grips to work the whole end (baffle and cap) out...if the baffle doesn't come out with the cap, just pull it out with the grips.
-R