Unhappy [Q] Touchscreen too sensitive after removing ASF

Hi Guys,

This is my first post on XDA, I have a problem with my Z1, recently I remove ASF protector from my phone, now my phone seem too sensitive, when I touch my phone with my hands thats slightly wet, either from sweat or water (yes, my hands sweaty, and very often) screen like register my previous touch and screw my touch.

Is this hardware failure? can I claim warranty? or this is is common on the ASF removed phone.
Thanks.