[quote name='leveskikesko']I know the perfect trick. I know it sounds dumb, but it worked flawlessly for me. If it's just a bit of dirt, which it sounds like it it is, it'll come out.
Basically you get a q-tip. Wet that q-tip with water and rub that q-tip near the r button. Then blow near that r button area, so hopefully dirt will escape. Finally dry the ds off with a tissue or something.
Repeat until it works.
If it doesn't work the first time, it might work the second, or third, or fourth. It took me about 3 times before it worked.[/quote]
Thanks! I did exactly that, and it worked the first time round.
Thanks again!