While straightening shampoos and conditioners can help to make natural hair smoother and easier to straighten, it's important to note that they are not a substitute for heat styling tools such as flat irons. Here are the steps to straighten natural hair with straightening shampoo and conditioner:

  1. Wash your hair with a straightening shampoo: Use a straightening shampoo that is designed to help smooth and straighten your hair. Apply the shampoo to your wet hair, and massage it gently into your scalp and hair. Rinse thoroughly with lukewarm water.

  2. Apply a straightening conditioner: After shampooing, apply a straightening conditioner to your hair. This will help to moisturize and smooth your hair, making it easier to straighten. Leave the conditioner on your hair for a few minutes, and then rinse thoroughly with lukewarm water.

  3. Blow-dry your hair: Use a blow dryer with a nozzle attachment to dry your hair. Direct the airflow downward, and use a round brush to help smooth your hair as you dry it.

  4. Apply a heat protectant: Before using a flat iron or other heat styling tool, apply a heat protectant to your hair. This will help to minimize heat damage and keep your hair healthy.

  5. Straighten your hair: Use a flat iron to straighten your hair in small sections. Take a small section of hair, and clamp the flat iron down on it near the roots. Slowly slide the flat iron down the length of your hair, repeating as necessary until your hair is straight. Work in small sections to avoid damage to your hair.

Remember that heat styling can be damaging to your hair, so it's important to use a heat protectant and avoid excessive heat exposure. Additionally, it's important to maintain a healthy hair care routine, including regular conditioning and moisturizing, to keep your hair healthy and strong.