Warm water opens your pores and cleanse your scalp. Cold water seals in moisture and increases your hair’s natural shine. [2] X Research source The lightweight volumizing shampoo won’t weigh your fine locks down with added moisturizers. [3] X Research source

Use a wide-toothed comb to evenly spread the moisturizing conditioner and detangle your hair. The moisturizing shampoo and conditioner will hydrate your hair, preparing it for the straightening process. [4] X Research source

Rinse your hair with warm water. Apply a cleansing shampoo directly to your scalp and work the product into a lather. Do not apply any shampoo to the ends of your hair. Rinse the product from your hair with warm water. Apply a moisturizing conditioner to the ends of your hair (from the mid-shaft to the tips). Rinse out the conditioner with cold water. Step out of the shower and squeeze or pat the excess water from your hair. Instead of a towel, use a cotton t-shirt or a microfiber cloth. Apply a deep conditioning treatment to your hair, start with the ends and work your way to the roots. Apply a heat source to your hair for 30 minutes — if possible, do this by sitting under a hooded hair dryer. Let your hair return to room temperature and then rinse out the product with cold water. Squeeze or blot the excess moisture from your hair with a cotton t-shirt or microfiber cloth. Lock in the moisture with a light coat of leave-in-conditioner or oil. [5] X Research source

Never towel dry your hair. The fibers will damage your hair cuticles, leading to frizz. [6] X Research source

For fine hair, apply a volumizing mousse with an added heat protectant. For coarse or thick hair, apply a smoothing serum with an added heat protectant. For natural hair, apply a silicone-based heat protecting serum. [7] X Research source

Blow drying your hair all of the way will produce sleeker tresses. It will also give your hair more volume. [8] X Research source

Consider using a nozzle attachment on your blow dryer with a brush. Make sure your hair is completely dry before using a flat iron. [9] X Research source

For natural hair, set you flat iron between 300℉ and 350℉. For fine hair, set your straightener at 360℉ or below. For medium or wavy hair, keep your straightening iron between 360℉ and 380℉. For thick and coarse hair, set your flat iron between 380 and 410℉. [10] X Research source

Put a fine-tooth comb below the flat iron and pull it down with the flat iron so you don’t accidentally go over the same section of hair twice.