Use a pre-shampoo serum or oil if possible. This helps to detangle the hair and remove frizz which reduces breakage during the shampoo. Choose a shampoo specifically for curly hair. Dilute it and avoid excess usage of the product. Use a wide-toothed comb and avoid brushing curly hair. Do not use high heat when using styling tools and use a heat-protector beforehand. Curly hair should be washed with cold hair to keep it hydrated and reduce frizz. Trim regularly to avoid split ends.