I hadn't touched my DS in a week or so, my brother was playing Ninjatown with it for a while. Then I get my DS to fire up some Castlevania, and I'm surprised to see that all my D-Pad buttons, except for the Up arrow, are no longer responsive. What I mean is, they do still work, but I have to press much harder for the DS to know that I clicked something, and it doesn't.. how do you say it.. feel 'normal'. It's really soft. So I want to know how can I get my D-Pad normal again? I will probably have to open my DS right? but will I need to buy anything? (hopefully not) Thank you!