My iPhone 4s is acting weird, what should I do?

I have an iPhone 4s and I have had it for 5 months. About a week ago my iPhone began to close out of my Facebook and Instagram as soon as i click on the app. I wonder if my phone needs to be cleaned. I don't want to give my phone up, because i love the iPhone 4s. Can somebody tell me how to clean my iphone for FREE, no PROBLEMS, and nothing ILLEGAL.

Kill it before it lay eggs!

You can do one of the following:

1. Restore it with iTunes
2. Delete and reinstall the apps.
3. Take it to the Apple Store

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