Originally Posted by GotGarlic
I put them in a bowl of cool, salted water overnight and stirred them every so often. It seemed to work.
It does, though not as well or as quick, particularly if they are a really sandy bunch of clams. The Serious Eats link has a note explaining how to do it at the bottom. You might have to change the water out several times if they are really sandy. And salt the water enough to where it tastes like the ocean. We used to do it in just cool tap water.
If you get lucky, you might just have to do it once.