Their is a tool rem sells specifically for tear down of the bolt...of course being stupid I never looked into it and use a swiss army knife with the flathead scredriver attachment. You can also clamp a good sized flathead in a vice then place in the slot and unscrew. Basically you need to pull up on the firing pin by way of the slot and unscrew. Once apart I wipe down to remove grease and grim, then I spray on cleaner, either windex, breakfree or BP Solvant. I use a cheap tooth brush, then rinse in hot water, wipe down again and let air dry. Bolt I use a baby tooth brush or small patchs with cleaner and then rinse and dry patch, let air dry, regrease and put back together. It by far takes the most time but my bolt looks like new inside and never has had any problems in 6 years with it not going bang!