Unlike most of the vegetables we’re talking about, when you get your sweet potatoes, you don’t need to remove any soil your find on their skin. This soil aids in their curing and storing process. They are perfectly fine with dirt on them until you are prepared to cook them. Just wash them when you’re ready to cook. They’ll store best (unlike many other things) in a sunny, hot and dry location (such as a screened in porch or in the window sill of a sunny window). Be gentle, any bruising will lead to soft spots latter on. By leaving them in the sun, you’re actually help cure the sweet potatoes and they’ll keep longer. A well-cured sweet potato will keep for MONTHS. Once they’ve been in the sun for about two weeks, move them to a cooler location and then bake them up as needed.