spray generously on damp, towel-dried hair, making sure to distribute the activator throughout the hair evenly. Using a hairdryer, rough dry to remove excess moisture, then comb and divide hair into sections. Using a styling iron, or hairdryer with a round or flat brush, smooth out each section from root to end until dry. Note: Some steam may occur; this is the heat activator hard at work, creating a protective, anti-humidity seal. Must use heat to activate and reactivate between washes.