IPhone front camera not working?

I have an iPhone 4 and up until about 2 weeks ago the front camera was working absolutely perfectly and always gave really clear pictures. All of a sudden it has stopped and I can barely even make out a face in it it's that blurry. Is there anything I can do without taking it to the Genius Bar? I live pretty far away from it so its a bit of a pain.

Make sure it is clean, give it a wipe with a cloth. If that doesn't help, try factory resetting it. If that doesn't help you can call up apple, if you go on apples website, go to contact us and they may be able to resolve it on the phone.