Badly soiled leather goods can be cleaned with a sponge or cloth with lukewarm water, then allowed to dry thoroughly. Deep scratches or other surface damage may require an application of leather dye in an appropriate matching color. Other than that, neutral shoe polish is the only thing I recommend for surface treatments. Mostly wax, provides reasonable protection against scuffs, scrapes, and moisture.
Anything based on oils or greasy products should be avoided. These are absorbed by the leather fibers and, over time, will make the leather softer, more pliable, and defeat the makers' forming work until you have nothing left but a limp and useless piece of old hide.
Neutral shoe polish will not transfer stains to the clothing or skin. It is nothing more than a clear wax mixture that provides surface sealant and abrasion resistance.
Helpful hint: If you are doing this more than 3 or 4 times per year you should consult with a mental health professional for diagnosis and treatment of your obsessive compulsive tendencies.
