IOS: Is there a way to clear AvPlayer streaming data?

I have streaming applications from a scream server. It works fine, but I noticed that the documents and application data in Settings> General> Use work when I use the application. The application itself is only 776 kilobytes, but the data went from 1.3 mb to 1.5 mb after 30 minutes of streaming. Is this because streaming audio is cached using AVPlayer? How can I stop this or at least remove the cached sound when the application is killed? Also, if I do not allow this, will my application be rejected from the application store? Many thanks.