iPhone Cleaning on Apps?

This was a recently post but one of the people I follow on twitter:

	Jennifer Wahlberg (@CocoaColaJenn)
3/20/13, 6:02 AM Have you ever seen this on your iPhone? I won't let me in Facebook and it says "cleaning"pic.twitter.com/qDH3i64cnL

This was interesting to me because I had never seen it. After researching this is what I have found:

• This started in iOS 5
• This is nothing bad it just means that the iPhone is cleaning out the data/cache files stored on the phone are being emptied. Apple is being more strict on the amount of data that apps store so in an attempt to keep the storage amount down it clears the data every once in a while. 

Two good sources: 

http://www.marco.org/2011/10/13/ios5-caches-cleaning

https://discussions.apple.com/thread/3454052?start=0&tstart=0