My dad just got an ipad and i was setting it up for him and signed in with my account during the set up process. then I realized that probably wasnt a good idea after i saw that my imessage messages were showing up on the ipad even after i signed out so i reset the whole device and its still doing the same thing! Is my account permanently associated with the ipad or is there a way to undo it? Should i restore it to factory settings?