I am having the same problem and not finding a solution. I know this thread is old, but still I'm sure that there are people still wondering. Now mine has the same problem like said earlier, but there is one added thing too. It is VERY sensitive to any kind of moisture on my finger. The screen will freak out untill I lock it and wipe it off. Not that hard to do, but very annoying. But even if it'd very very close to dry, for example a little sweat on the finger tip, has the same effect as a much bigger volume of water. I did buy my phone off of Craigslist though so it could be something that happend with the previous owner that wasn't said to me when buying. So I take it that there are no solutions? I need the answer to be as simple as possible.