For the past month my DS (Phat)'s R button is unresponsive most of the time I press it, and now it seems to have stopped working completely. It's not just the game, it happens in every game no matter if its a ROM or a real cartridge. I've tried using an index card to clean around the button and also blowing on it to try and clean it, and it seems to work for a bit but then it stops working after a few presses again. It's an old DS that I bought the year the system came out, and also flashme was installed onto it. The warranty is definitely up, so a free repair is out of the picture. I was wondering if there's a way to fix this myself or should I send it to nintendo? I don't want to lose my DS, and I can't afford a new one at the moment. Any input is welcomed.