Gaming Fixing the DSi shoulder button from the inside?

[knilsilooc]

I've been dealing with my DSi's faulty R button for awhile, and frankly, I've grown quite sick of it. I keep blowing into the space beneath the button, and while that works for about 20 seconds, it's nothing but a quick fix. I'm willing to open up the DSi and fix the problem myself, but I can't seem to find a guide telling me exactly what I should do. Does anyone happen to know how I would go about fixing the R button after opening the DSi?