This will induce the clam to release sand. Cover the clams with salt water (1/3 cup salt to 1 gallon of water) and let sit for several hours.
Since clams naturally burrow in the sand, they need to be purged of grit lest crunching down on grains of sand diminish your enjoyment of this flavorful seafood. First, scrub the outside of the clams thoroughly with a stiff brush.