Wash and scrub the outer skins. Prick the outsides several times with a fork or knife to to allow steam to escape while cooking, sprinkle skins with salt. Wrap each one inside 1-2 wet papers rolled up all the way around to keep it moist.
Microwave the on high power for about 7-8 minutes for a medium potato. If you have a larger one, you may need to increase the cooking time by a few minutes. Turn over halfway, so 3-4 minutes per side usually does the trick
Check insides for doneness by inserting a fork or knife into the center. If it slides in and out easily, the center is cooked.If the middle is not fully cooked to tender, return it to the plate to cook for an additional 1-2 minutes.