My iphone keeps logging me out of my email and Facebook?

I have to keep logging into my email and Facebook on my iphone 5. This has never happened to me before. Any suggestions?

I might be wrong but i think it logs you out when you delete your history.

Make Sure Remember Info Is Checked Off on Facebook Also Check And Make Sure you Can Login Fine From the Computer it Could Also Be a Error With Facebook That The Facebook Team Needs to Fix

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