there is alot of build up in my battlecomp, i can get most of it out but some small clumps always stay on the side. i tried taking it off to get to the mess but every time i put enough force to maybe unscrew it, i see the barrel flex a little and it freaks me out so i stop. anyway, my question is........is okay to leave the little bit of build up that just wont come out? will it effect accuracy? anything else? thank you.