Please choose the correct ending to complete the given sentence: Health: [header] How to clean your scalp [title] Use a clarifying shampoo. [step] Once a month, you should wash your hair with a clarifying shampoo. Leave the clarifying shampoo on your scalp for three minutes (or just follow the instructions on your shampoo).

Ending1: Wash the sulfates out of your hair with cold water. [substeps] Some people can also use a natural scalp moisturizer for temporary hair care. Ending2: Rinse your hair as often as needed, until all the shampoo is off. Some clarifying shampoos may require a quick rinse, but the results will always be the same for every time. Ending3: Then use a hot tub to wash your scalp. Remember to keep your hair out of the shower for only thirty seconds and use plenty of water. Ending4: This will help remove buildup and dead skin cells. [substeps] Clarifying shampoos can strip hair color, so use them before you get your color done again.

Answer format: ending1/ending2/ending3/ending4