Please choose the correct ending to complete the given sentence: Health: [header] How to clean behind your ears [title] Select an appropriate cleanser for your skin type. [step] Most people can simply use regular soap-whatever you wash your body with in the shower-to clean behind their ears. If you have sensitive skin, use a gentle foaming cleanser like a product you would use on your face.

Ending1: [substeps] Use a cleanser that you're familiar with-if it's comfortable on your body or face, it probably won't irritate the skin behind your ears. [title] Use acne wash if you have blackheads. Ending2: If you have sensitive skin, choose one you would use on your hands. [substeps] If you have sensitive skin, always shampoo and condition your hair and hair first in a shower. Ending3: [substeps] You can buy a cleansing product at your local drugstore or pharmacy. Before applying the cleansing products, make sure you know your skin type so you can buy the right brand. Ending4: [substeps] If you have oily or dry skin, choose products with a ph of 70 (or higher) to avoid abrasions and pimples. [title] Use a non-abrasive cleanser.

Answer format: ending1/ending2/ending3/ending4