Please choose the correct ending to complete the given sentence: Youth: [header] How to get rid of cystic acne [title] Keep your skin clean and moisturized. [step] Start washing your face twice a day with a water soluble cleanser that is suitable for acne-prone skin. After washing, use an astringent lotion or toner-you can buy these over the counter.

Ending1: After that moisturise your skin with a light, non-comedogenic moisturizer to keep your skin hydrated without adding excess oil to you skin (which can clog your pores). [title] Use an exfoliator containing retin-a. Ending2: This will help reduce oil production in your skin. [substeps] Try to moisturize after cleansing with astringents and gently moisturize after washing. Ending3: Moisturize your skin before bed because it can cause pimples. [substeps] You can use an astringent lotion or moisturizer for acne-prone skin. Ending4: [title] Use cleansers once per day for dry, acne-prone skin. [step] You can use a sugar-free cleanser or you can steam or apply an astringent-free cream like bentonite.

Answer format: ending1/ending2/ending3/ending4