Thompson Center makes a bore cleaner for their muzzle loaders that works well but I have also used hot water and soap and windex. All it takes is a good cleaning afterwards. I have quite a bit of 7.62 soviet that's put back in case of emergency that is corrosive. If the day comes when we start shooting it so be it. it will be there but I would just as soon shoot the good stuff. Actually I have some Norinco 7.62 that is more accurate than the non-corrosive stuff.