jaybe covered the subject of the water bath real well. I personally like HOT water with a little Dawn Dish Soap. That really seems to pull the fowling out of the barrel.

Somethings I do, especially on new rifles is after the water bath, I want to run a good cleaner down the bore and make sure there is no packing grease or excessive anything. A real good cleaner I found is called Simple Green. You mix it with water depending on the strength you want it. It is a great cleaner.

Some good black powder solvents are Butch's Bore Shine for Black Powder, and Birchwood Casey #77. Also Black Off - Rusty Duck work real good on black powder fowling.

After I am sure the bore of the rifle is clean, I like to put some isopropyl alcohol on a patch and run that down the barrel. That will help remove any mositure in the barrel. Then I dry patch it until the patches come out clean and dry. After that I oil my bore with Birchwood Casey Sheath which I was told is now under a new name which I forget.

Be sure and scrub the bolster area real well. And take some Q-tips and clean the hammer nose real good. If you fail to do that they will rust up in there and then sooner or later the hammer will rot away on you. Pipe cleaners in the nipple port will make sure the snail is open and clean and dry.

Every once in a while take a .22 caliber cleaning rod with a bore brush on it. Wrap a patch in to the wire brush and saturate the patch with good solvent. Then reach down in there and clean the base of the breech out. They also make bore scrapers for that too...