Sony Xpreia Z3 not reacting to touch

Hi,

I have a Sony Xperia Z3 that is not reacting to touch. It gradually got worse and it is now completely unresponsive.

The LCD is working fine, the glass is not broken. So I am guessing it is the digitizer?

Also, this creates some problems with resetting the device. I have been thinking about sending it somewhere to get it fixed, but I want to wipe it first (factory reset).

I am pretty ok with doing things myself as my job revolves around technology and computers.