twitter

Hi, I have a problem with the Twitter App. A friend borrowed my iPod touch to check her twitter, and now that her twitter account is not in my ipod anymore, i continue receveing her notifications. I have an ipod touch 4 generation, with the 5.1.1 iOs version. I've deleted the app from the ipod and also from itunes too many times. i even receive the notifications without having any account loged in. I've deleted the accounts from the settings file, so, there is no account in the ipod. so, please, i'm a bit desperate. What can i do?? Please, i need help as soon as possible!