What is the proper washing system for raw kale?

fill your clean sink halfway full of cold water, then add 2/3 c white vinegar. add your kale leaves, swish around for a minute, then let them sak for 5-10 minutes. the soaking alows all the sediment and contaminants to fall to the bottom. pull your kale out and place in a collander, drain your sink, then rine your kale very well. then let it dry on paper towels. I have made kale chips before with fresh kale from the farmer's market and had to wash it this way. there was a lot of dirt at the bottom of my sink after soaking, which is why you rinse it again in the collander. the kale chips I made were salt and vinegar, and I found them too bitter. good luck!