I have some questions. I've never sold an ipad before, I went from an ipad 2 to an air 2 and now I'm buying a 10.5. I plan on selling my air 2 and want to make sure there is zero information on it before shipping it. If I completely reset my ipad is that enough or should I completely reinstall IOS? Is there anything i need to worry about or do so that my apple ID isn't screwed up? Other things I'm not even thinking about?