How to fix your front camera when its starts to blur up?

All the sudden every time I open my camera it's really blurry and i don't know what to do. I have a iPhone 5s by the way if that matters.

If it was in a very hot/moist place, including like using by water on a stove top boiling, it can actually fog up the camera. The only other thing I can suggest is either pushing somewhat hard on the front camera or try reBooting your iPhone 5s by holding the Power Button and the Home Button.