I recommend using hair spray on the hair when using a flat-iron or a curling iron. Preferably an aerosol type of spray. I have found that the use of a pump-action spray has too much ”Gum” and also too much ”Water” in the product. Also a lot of consumers need to know that the temperature of the flat-iron and also the curling iron should fluctuate during the straightening process and also the curling process. You should not use a high temperature on blonde hair that is artificially lightened. Especially when bleach has been used. Thick coarse hair will need a higher temperature when curling the hair. And hair that has been lightened with a bleach should need to have extra attention to it when curling. Pre-lightened or bleached hair should also have some type of spray added to the section before curling. Make sure your sections are of the same size. A thicker section will give you a looser curl. If that is what you want. When you are finished styling the hair also always use a light condition cream throughout the hair for added softness. This will take away from the crispness of the hair spray. But the hair spray will also give you a firmer hold to the hair.