deleting documents and data on iPhone 6s

My iPhone 6s was saying that the storage was full, so I wiped out nearly all of my photos (after backing them up) and I got rid of all of the Apps that I was not using...but my "documents and data" is still taking up 45.67MB of space on the phone. I have restarted and backed everything up. I am petrified at the thought of wiping my phone and restoring everything myself. Should I just go to Apple and let someone else do this for me?