IPod Touch 2nd Generation Problem!?

Okay so I've had my iPod 2nd Gen for years now and I use it going back and forth from work for music, but lately it had been acting up such as the ipod was switching applications and doing as it pleased without me even touching the screen (Digitizer) so I got a new digitizer and replaced it , I made sure the port was not dusty or blocked and I still am getting the same problem, if anyone has any advice I'd be grateful for it.