Personally, I think my dandruff is caused by a history of eczema, shitty New York tap water, and chronic bad juju. After my traumatic episode, I searched the racks of Duane Reade for any type of drugstore-brand scalp treatment, when I came across a familiar face: tea tree oil.
From Midtown or the Village, take the F or D trains that run down Sixth Avenue from Central Park to Washington Square or the N or Q trains that run down Broadway to Canal Street. All four of these trains will take you directly to Coney Island in Brooklyn.
The states you pass on your way to and from NYC are Maryland, Delaware, Pennsylvania and New Jersey. Now, instead of driving into New York City, why not park your car in New Jersey and take the train into the city, which will be cheaper and less of a hassle.