Why is my Blu Studio G Plus screen not responding?

Though the screen is cracked it has been for the last few months and was working just fine. I’ve tried putting it in rice for a few hours and it was back to normal for about 5 minutes then stop responding, I’ve even used a low cool blow dryer on it which made it work as normal for about an hour and a half but once again stopped responding. The power and volume buttons still work though.