Touchscreen not working at the center in Asus Zenfone 2 It's been a week, and I've been facing a touch related issue in my Asus Zenfone 2 running Android 5.0. My smartphone's touch is not working at the center. Touch test showed blank area at the center. How to solve this problem? Is it a software or a hardware specific problem?
This happened after my phone got wet in rain: I used Screen Touch Test to test touchscreen:
(Click image to enlarge)

My device is neither rooted, nor is under warranty. I did factory reset but it didn't help.
Your touchscreen hardware is broken. You need to take it to your local repair shop and have the touchscreen replaced.

If it were new (and therefore faulty when sold) or still under warranty, the manufacturer would be more than happy to replace it: I have friends who've experienced the same kind of problems and got replacements, even on cheap unbranded tablets.