Why isn't my Samsung Galaxy A5 camera not focusing?

My camera on my Samsung won't focused anymore, the photos come out blurry. I've turned it off and on, restarted the phone, and nothing is working. 

Hi Hayley. Please check the camera lens cover. It's probably dirty that's why it's blurry and can't focus. Other than that, please try using a 3rd party camera app.

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