Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to break in a new pair of tennis shoes [title] Purchase a small can of mink oil. [step] This can be found at any retailer that sells shoes or any discount retailer. A can costs about us$ 3-5.00.

Ending1: [substeps] Mink oil is a waterproof liquid that creates a barrier that prevents moisture from accidentally getting into your shoes. Mink oil is available at most department stores, but you can also purchase it at specialty brands such as red bull. Ending2: [title] Wash your hands thoroughly with soap and water. [step] The mink oil will be more powerful when it's used on your skin than on your hands. Ending3: [title] Rub the mink oil into the shoes very liberally. [step] Leave a residue on the shoes, this is okay to do. Ending4: Make sure to buy a pair that is for your entire body because mink oil can penetrate into you. [title] Apply the mink oil to your feet and big toes.

Answer format: ending1/ending2/ending3/ending4