the_dengle on 27 September 2013
This happened to my L button months ago. It's funny you mentioned blowing really hard, because that's how I deal with the situation.
Put your mouth around the R button and blow into it. Don't spit in it. It's easiest to do this while the system is closed. It won't "fix" the button, but it'll make it more responsive for a while, usually for a full play session.
