To get rid of sand and grit, some put in the cold water.
I bought 500 g of clams, about 40 of them. Place clams in a large bowl. Pour in water enough to cover the clams and 2 tbsp of salt.
The my mil taught me to steam them for 5 minutes. All of my clams are fresh if they open when they are cooked.

If everything fails https://www.wikihow.com/Clean-Clams
