Vinegar and a stiff brush are all you need.

Yes, that’s the simplest effective method.

For salt stains, mix equal parts white vinegar and water. Dab it on the stains, let it fizz, then wipe clean. Salt will eat through leather and fabric if you leave it on over the summer.

For mud, let it dry completely first. Then brush it off with a stiff brush—an old toothbrush works for crevices. Don’t scrub mud while it’s wet, or you’ll just push it deeper into the grain.

After cleaning, let boots dry fully at room temperature (not by a heater), then give them a light conditioner if they’re leather. That’s it. No special sprays or gadgets.

Store them clean and dry, and they’ll be ready next season without that crusty white residue or stiff leather.