KYCarl nailed it with the acetone and cleaning the parts well. All of that goo inside would be enough to hang parts up, like the disconnect, and cause the rapid fire that was experienced. I use either a "very" light coat of Breakfree or Remington gun oil, and....very sparingly. If I want to prevent rust there's a product that I have been using called "RIG", about $20 for a pint tub from Brownells, will last me for years and I always use it before I put my firearms away on the inside of the barrel and the outside of the weapon; but, never on internal parts ever. RIG is like a clear grease, only lighter, for the barrels I use a nylon bore brush with RIG on the brush and coat the barrel as if I were cleaning it. On the outside I use a RIG rag, sort of like a lamb's wool cloth, again saturated with RIG.
