Some portion of the straps of my traditional canoe packs and thwart bag are always in the bilge water, hardening them over time.
How do people keep their pack leather in good conditon? Some horse tack site explained that you can use saddle soap for cleaning, a leather conditioner after cleaning, and maybe mink oil or leather grease for true water proofosity as needed (for shoes, for example), although that would clog the pores of the leather and deteriote it over time, unless you cleaned it after.
I’ve occasionally been using the conditioner (Fiebing’s 4 Way Care), but it tends to soften the nice lively straps into soft limp dead straps. I try to not overuse the product, only every few outings…