I've been using Muzzleloaders for over 25 years "mostly C&B revolvers & Civil War style Rifled Muskets" & I swear by the hot soapy water clean up for them, to me there is nothing like it to getting yourBlack Powder weapons clean.

During a rangesession I'll have a spray bottle of either dish detergent & water or the Traditions cleaner to go inbetween shoots, this way your accuracy & ease of use will be improved but when it is all said & done a good ole bath & then a good oiling will do it loads of good for the long run.

These modern inlines like my Traditions Yukon I think you can get away with just having the barrel in the solution & work it in & out with the cleaning rod through the breach & an occasional bore brush to get any harsh fouling like at the breach plug & leading "if you use full lead bullets like some may still do" & then ofcorse dry it good & oil it while it's still hot..