I had a T/C 209x50 Magnum muzzleloader, but I sold it some time back, mostly because of the trouble/time/hassle involved in cleaning it. Couple that with Minnesota's muzzleloader deer hunting season being late and usually very cold, after the rut is over and the deer aren't moving much, and I gave up.
The safest way to unload a muzleloader is to fire it. Fire the gun once, just to unload it after a weekend of hunting, and you're committed to an hour of dis/reassembly and cleaning. Was a fine gun, but I just got tired of it.
Muzzle-laoding is special - some people find it time consuming - which it is.
There are different lub combinations which can somewhat compensate for temperature. Winter lubes get runny in summer and summer lubs gunk up in cold weather.
My muzzle-laoding Enfield, with the right kind of lube, can be shot all day without needing a cleaning - but then I never shot it in Minnesota in winter.