Rinse the clams under cold running water
Scrub the shells with a brush to remove sand and grit
Discard any cracked, broken, or open clams that do not close when tapped
Soak the clams in cold salted water for 20 to 30 minutes to help purge sand
Lift the clams out of the water and discard the soaking water
Repeat the soaking if needed until the water is clear
Rinse the clams again under cold running water
Keep the clams chilled until ready to cook
Use the clams promptly after cleaning