I've been having a problem with my ds lately, the touchscreen isn't accurate, i'd touch one spot and the mark would hit a little to the right. I've tried recalibrating multiple times, but it just doesn't work, the test doesn't stop, even after multiple trials. I touch the middle of the + everytime, but the test doesn't ends and it continuously prompts me to touch the middle of the +. Should I get a touch screen replacement or is there something wrong with the hardware?