Strange Issue(Auto Touch) with Touch on HTC Desire X. Has anyone experienced this?

I have got a HTC Desire X about 3 months ago. I've quite enjoyed the features it comes with. For the past week or so, I have been facing with this strange issue. The touch screen acts as if it is being touched even when I am not touching the screen. First, I couldn't understand what was happening as calls were getting disconnected or answered automatically. Then, I turned the Show visual Feedback for touches from the developer options in settings. I could now clearly see the screen is detecting a touch on its own. I Factory resetted the device from the settings and from Bootloader as well. It works fine for a couple of days without any issues. But, the issue comes back. Please help me with this issues. Thanks in advance. TLDR: Touchscreen touches automatically. Factory reset resolves the issue, but only for some time(2 days at max, an hour at min).