Over this past weekend i ran a 2 day defensive carbine class and ran my 11.5 with an rc2 pretty hard and put about 750 rounds through it in the rain, mud and off objects. I got it home and it was incredibly filthy on the inside, so much so that i had to take out the fcg and safety just to get all the gunk out. When i took off the rc2 it was obviously a little sticky and tough to get off but now it has a litttle bit of a sticky spot right before the ratcheting starts. I noticed that i was getting a little bleed out the back end of the suppressor and the muzzle device, so i am wondering if there isnt some built up carbon underneath the ratcheting portion of the suppressor. Is there a way to clean behind the collar .ie spray some cleaner of some sort around it or another trick or is this simply a no go?