It's important to clean leather clothing, particularly jackets, with some degree of regularity, as leather, which is a highly porous material, absorbs odours, pollution and dirt rather easily. While you can clean leather by purchasing a special cleaning agent made especially for leather, you can also cleanse and refresh it at home by using ingredients found around your house, including olive oil.
Dampen two soft cloths with lukewarm water. Make sure the cloths are just barely wet.
Pour three drops of gentle hand soap onto one cloth, and rub it in until it is well-combined. Alternatively, you can use 2 tbsp white vinegar.
Pour 3 tbsp olive oil onto the other damp cloth. Rub it in until olive oil saturates the cloth.
Rub the first cloth all along the surface area of the leather jacket, wiping away dirt. Follow immediately with the cloth dampened with olive oil. Repeat once.
Buff dry with a clean, soft cloth.