While hunting i use t/c #13 solvent works very good . i ALWAYS break the gun down and clean in hot soapy water at the end of the season. i willl sometimes do it randomly during the season. now when i say season i mean the early season is one season and the late is another.
I don't think you can clean a muzzle loader enough.
The 13 works good and on a encore all the crud is in the bore anyway. but i think the soap an water works great for a good cleaning. i also use the T/C bore butter alot. also clean that breach plug and grease it.
leading not a problem with sabots but i have heard of people using cheap sabots with magnum guns and the plastic melting to the bore . i have been told it is very hard to remove.