What I do is take a q-tip and cut in half, pull off the cotton on each end, stick in a dremel on low speed and use the stem. I use Flitz and Mothers Wheel and Mag Polish. Be careful to leave yourself enough of the stem sticking out. You don't want the end of the dremel to come in contact with your trigger bar. After doing that several times, I will, again, cut a q-tip in half and clean up the areas with the q-tips. This works great for me. Not sure if anyone here on the forum does this same thing or not.
rich63