My UMC receiver for the wall plug has melted. See picture. I was always charging at 40A. I have read in several threads that people have reduced their current to 30A to prevent them from melting. Why 30, why not 5, or 35? This seems such a random recommendation that I've never seen explained. I just find it hard to believe that Tesla would keep making these and set them to default charge at 40A if they can only tolerate 30. The short cable from wall plug to box was so hot that you couldn't touch it and I always thought this was normal because that's how it had always been or if it had become gradually hotter must have happened so slowly that I didn't notice. After it melted I started using a different UMC and it doesn't get hot at all, at 40A, now I realize the heat wasn't normal. I am still a bit uneasy /scared of fire since the melting occurred, so considering lowering to 30A. Could this be safer or is it only "lemon UMCs" that get really hot and eventually melt? Obviously don't want to charge slower if there is no benefit to it. So, other than general personal opinions; does anyone actually have a solid theory or evidence showing that lowering the current to 30A actually helps?