Remove any damaged or wilted outer leaves
Separate the lettuce leaves
Fill a large bowl or sink with cold water
Submerge the lettuce in the water
Swish the leaves gently to loosen dirt and debris
Lift the lettuce out of the water
Repeat with fresh water if needed
Drain the lettuce well
Dry the leaves with a clean towel or salad spinner
Use immediately or store in the refrigerator