In the past, I was a history reenactor and shot 60 to 100 rounds per day. The rifle gets really dirty. I clean my flintlock similar to the rest with some differences. I first use a "turbo" bore brush and clean out the heavy build-up. Then, I heat water in a kettle to near boiling. As the water is heating, I remove the lock and plug the barrel. When the water is ready, I pour hot water down the barrel using a funnel and let the rifle sit for a few minutes. Then I pull the barrel plug and watch as the water flows out of the touch hole noting if the water stays dark in appearance or starts to run clear. If dirty, repeat the process, if clear, I run down the barrel several dry patches to remove any water and finish with a patch coated with bore butter from Tomson Center. The hot to warm barrel allows the boar butter to easily flow and lightly coat the barrel to prevent rusting. I have never had any issues if the rifle sits for six months or more. The lock is cleaned in the hot water, scrubbed with a brush, dried, and sprayed-down, with WD-40 and reattached to the rifle. The men in my Regiment would sit around the fire pit and clean our Brown Beses after the last battel of the day using this method that takes about 15 minutes.