[like_butta]

Hey Kev, had this problem this weekend and found that my issue was moisture underneath the screen.

Based on your pictures that you sent the issue looks very similar and the solution that I've found online (and it works) was that I took my fingernail and separated the plastic screen (slowly and carefully) from my device, until the moisture spot cleared.

I let it dry and my touchscreen was fully responsive again. The past week was really hot and I believe while having my TP2 at my ear sweat might have leaked under the plastic screen and created the moisture spot

Hopefully this helps.