Hard water leaves a mineral film that dulls hair and mimics buildup, which tempts men into washing more often and making it worse. Rinse cooler, condition every wash, and the film clears. Heat is the other culprit: a hot dryer held close does more damage in five minutes than a week of styling product. Dry on a lower setting with the nozzle moving, and finish cool to set the shape.

Scalp first, hair second

Hair behaves the way the scalp tells it to. Harsh detergents strip the scalp, it overproduces oil to compensate, and you end up washing more often to fix a problem the washing caused. Gentle cleansing two or three times a week, a conditioner on every wash, and a cool rinse at the end does more for shine and manageability than any styling product. If you have buildup, it will usually clear within two weeks of changing how you wash rather than what you style with.

Choosing a finish

Pomade on damp hair gives a natural, moveable finish; the same amount on dry hair gives more grip and definition. Restyle later in the day with wet hands instead of adding more product — layering is what makes hair look heavy. Fine hair wants less product placed at the root for lift; thicker or coarser hair wants it distributed mid-length to the ends where the weight actually helps.

Scalp first, hair second

How hair behaves is decided by the skin it grows out of. Strip the scalp with aggressive detergents and it overproduces oil to compensate, which is the actual cause of hair that looks greasy a day after washing. Neglect it and buildup dulls every strand and flattens volume at the root. The fix is unglamorous: wash two to four times a week rather than daily, work the shampoo into the scalp with fingertips rather than piling it on the ends, and condition the lengths rather than the roots.

Styling without wrecking the hair

Most styling problems are application problems. A fingertip of pomade on damp hair gives a natural, moveable finish; the same amount on dry hair gives more grip and a firmer shape. Emulsify it fully between the palms before it touches your head, start at the back and work forward, and restyle later in the day with wet hands rather than adding a second layer of product. Finish a wash with the coolest water you can stand — it closes the cuticle and adds shine no styling product can fake.