tepid tap water to me is "room temperature" or thereabouts, i just left out the "tap" in my earlier post. bottom line for me, never hot water down the tube. nor soap or alcohol or washer fluid or what not, imo. to each their own, i look to the past first, before the present, to see and compare all things about trad muzzleloaders. plain ol' water is all it takes, as was done for hundreds of years and those guns lasted for generations. my modern approach is to use ballistol with the water as insurance that some amount of preserving is being administered during range/field cleaning. i do that to all my bp guns, muzzle and breech.