I have this really annoying problem with facebook notifications. So A few weeks ago I let my sister borrow my phone to sign into facebook using the facebook app. After she logged off and I logged into my account I am receiving notifications for both my account and also hers. I tried uninstalling the Facebook and re-installing it but her notifications still show up on my phone. Is there something I can do to stop getting her notifications even if she's not logged onto her account on my phone?