Then I took it nicely and shook the leaves with my hands, to wash them well and to pass the soil and the sand from them into the water. Then take a handful of leaves with your hands, shake off the water and put them in a larger bowl.
Release the water from the sink, wash it well of the sand left by the leaves. Put the spinach in the sink again, leave a lot of water and repeat the whole procedure 2 more times. This is to make sure that you will not have sand and earth in the spinach food.
Once upon a time I used to wash the spinach, each leaf separately - it took me about 1 hour for the whole procedure and it was made for me. I saw this method with the sink at Julia Child, I find it ingenious.