[sourdough]

Others will have their opinions but I would replace it. I've had the same situation a couple of time. First time tried various ways of "fixing"/"repairing" it but I didn't like the results. Bought a new plug and was just going to put a new end on it - upon thinking about it I liked the molded end far better for protection so that plug still sits on a shelf in the barn. When your wrestling with that plug to push it in/pull it out standing in the rain in a puddle you WILL be the shortest route to grd. for the power when the insulation fails.