If I leave my screen on for a while, or play for it a lot the screen will stop responding to touch, or it becomes less sensitive to your touch and harder for it to react to your touch. It this a problem with anybody else?
I think it it because the screen becomes hot when it is on for periods of time and it cant distinguish between the heat of your finger.
The screen does not detect heat from your finger. It creates a magnetic field and when your finger passes through it there is a current. The reduced sensitivity may be a power saving feature.
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