well . if the rifle is built tight , there should be little to clean .
. now as a rifle gets more use and the lock is taken out and put back in , things wear and it can need to be cleaned more often . as i sit here writing this,,, im trying to think , but in all honesty i dont think i take my lock out but maybe once every couple months . simpley becouse there is really nothing there to clean , just a wipe down to get out any dust or matter thats gottin back there but I never find powder or fouling ?
if you are getting un burnt powder , your lock isnt fitting tight to the barrel .
if your getting fouling , then eather your lock isnt fit tight , the lock doesnt fit tight to the wood behind the cock or back edge of the pan OR you have a leaking breech plug .
now dust and things will work up through the triggers .
but if its indeed alot of fouling and un burnt powder then you have an issue that you need to address .