How to fully log out of Facebook app?

[Maddie]

My friend used her Facebook on my Facebook app. Now every time I go to log in, it says: logged in as my friend , continue or not you? I don't know how how to set it back up as my main account. So far I've tried logging her out and logging in as me and logging out again but it always says her email account is logged in. Help?

[Ruba~]

Go to settings
Then Facebook
Then click on the account
Then click on delete account

[A!]

Your using iOS account to sign in in facebook app. If you want to sign out completely just click sight out on your App Store in settings then sign out on facebook app. Hope I helped :/