There is absolutly no way to clean it without the proper software. If anybody tells you different...they are lying.
The best software for doing this is Internet Eraser. It is better, and easier to use than anything on the market.
You can get it here:
http://www.interneteraser.com/enter.html?ID=5432987
Dont be fooled by the claims that other companies make.
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Official Boneprone Family Member
Asslicking is what seperates the men from the Kids