Rdio: Unsync all music from your phone in one click

If your sync'd music has gotten out of control and you need to clear it and start again (something necessary since Rdio is pretty bad at telling you exactly how much space it takes up on your phone, unlike the Music app), there's actually a really easy way I just figured out. Go to Rdio in your browser, click Settings, then "Advanced." Then click the button "Reset sync to mobile". This'll clear out your sync status, and you can start again. Sweet!