On my ipad i have a main email, which is a Comcast one, that i use for everything Facebook, twitter, ect. I also have a second email account, which is a yahoo account, that i use for other things. But somehow my ipad hooked both of those emails up to it and now on some of my apps, the profile says its the yahoo email. I want the comcast one for my apps. I was wondering how to completely erase my yahoo email from my ipad. Help please