Stop right there! There's no need to remove the bolt, and it's not easy. You've got to line up the breech with a pair of holes in the receiver which allow you to drive a pin out the right side, unlocking the . . . . the short answer is don't.
Buy a can of brake cleaner from Cambodian Tire. Remove the barrel, and just hose out the insides with the breech forward and with it locked back. You'll be amazed at the crud that'll get flushed out. Do it outside, though, the fumes are strong. And don't get it on wood. Then re-lube lightly, and you're good to go.
Inspect the receiver for small hairline cracks that work their up from two pin holes by the magazine loading port.
Do you know how to set the rings?