To prevent drying and cracking, always keep leather furniture away from direct sunlight.

For deep nourishment, mix one part white vinegar with two parts linseed oil. Shake well, then apply with a soft cloth using circular motions to cover the entire surface. Rub in thoroughly, let sit for 10 minutes, and buff with a clean soft cloth for a natural shine. Repeat once more if needed before use.
To remove ink stains, dip a cotton swab in rubbing alcohol and gently dab the spot. Dry with a hairdryer. If the stain lingers, apply a thick layer of non-greasy, non-gel cuticle remover, leave overnight, and wipe with a damp cloth.
For dark stains on light-colored leather, mix equal parts lemon juice and cream of tartar into a paste. Rub onto the stain, let sit for 10 minutes, reapply, then wipe clean with a damp sponge or one lathered with moisturizing soap.
For everyday cleaning, use a gentle moisturizing soap like Dove. Lather on a soft cloth, wipe away dirt and grime without over-wetting. Avoid rinsing—buff with a dry cloth to let the soap condition the leather naturally. Polish as usual.
To remove road salt from leather shoes, mix equal parts water and white vinegar. Wipe the surface with a cloth dipped in the solution, repeating as needed. Finish by polishing and applying shoe polish.
Removable covers on some leather furniture can be machine-washed. Opt for a commercial machine for larger pieces, and always test for color fastness first.