I just bought a used Wii U. The guy i bought it from don't have any digital games on it (he didn't buy any). Can i just delete his Nintendo Network ID and link my own that i use on my 3DS? I've also heard that the console and gamepad scratch pretty easily, due to the glossy plastic, even with a soft-cloth. Any recomendations on the best ways to clean it without scratching it or leaving marks?