You might be tempted to crank up the hairdryer to “volcanic inferno.” Resist. High heat cooks the water inside your strands, causing them to swell and crack. That’s why your hair feels like straw after a hot blowout.
Drying Your Hair With A Towel
Instead, use a cool or lukewarm setting—it closes the hair cuticle, making it shiny and smooth. A 2011 study found that heat above 140°F (60°C) damages hair in under three seconds. So that “turbo” button is just a party trick for idiots.
