I am using parachute pre-shampoo cream, when using it my hair should be dry or wet?

it should be wet because if its wet it will be easy to get out and it will clean your hair then dribble out. But if you do it dry it will stay in your hair and you will be itching a heck of a lot!I am using parachute pre-shampoo cream, when using it my hair should be dry or wet?
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