Ok DC CAbets alcohol is a solvent, same for vinegar and cola and numerous other substances.
I've never liked using anything I knew was acid or caustic in a barrel. Whether vinegar, windex, etc. Most experienced muzzleloaders advise against using lard or bacon grease for patch lube because of the salts causing rust, but they use equally corrosive solutions to clean the bore. I like plenty of plain old water, perhaps a drop or two of soap to act as a surfactant and emulsifier. Water has some unique chemical properties that permit it to neutralize both bases and acids. (I studied that in Oceanography years ago, and never did understand the explanation for it.) Depending on what patch lube you use, you may need something more than water to clean out the lube residue.