Hang your leather jacket on a wooden or padded hanger. Place the jacket in a location where you can easily access all areas of the leather during the cleaning process.
Dust the leather with a microfiber cloth. Wipe the leather in one direction, from the top down to remove dirt and surface dirt.
Pour 1 1/2 tablespoons of white distilled vinegar into a bowl. Add 3 tablespoons of neat's-foot oil. Stir the two ingredients until mixed well.
Spoon a quarter-sized amount of your DIY leather jacket cleaner and conditioner onto a soft cotton cloth.
Buff the oil and vinegar solution into the leather surface. Add more of the solution as needed to remove any stains and moisturize the leather.
Allow the leather jacket to remain on the hanger, away from direct sunlight or heat sources. Check the jacket after one hour to see if all of the oil has been absorbed. Especially dry leather may require you to apply the solution once or twice more. If excess oil remains on the surface of your leather jacket, rub it off with a dry cloth.