Some folks like the BP substitutes, some don't. I don't. Where I live the cost of BP is a little cheaper than the substitutes. I have never used any of the special formulas that folks like to use. I just use water, hot if convenient and do the usual scrub and wipe. Best to be thorough and in a high humidty situation BP fouling that attracts moisture cn cause rust very quickly. BP ( and subsitutes ) should be cleaned immediately out of your brass. When I black powder shoot I have a jug of water that I toss my empty brass into. They clean up easier later and I have managed to get 25 or so reloads out of such brass as Beaumont, 11Mauser, .45-70. Usually what happens is case necks start to go especially in some of my .45-70 brass. Shooting BP weapons is another world and there are a pile of good folks out there who have their own magic formulas for loading, cleaning, lubricating and shooting. I like it all! Joe