It's generally not necessary to rinse kielbasa before cooking. Unlike some other meats, kielbasa is typically fully processed and doesn't have excess debris or particles that require washing. In fact, rinsing kielbasa might remove some of the flavorful spices and natural juices that contribute to its taste. Simply follow the cooking instructions provided for the specific type of kielbasa you have, and it should be ready to cook without the need for rinsing.