Default Fixing the power button

i have a problem when my phone power on after the battery was out without pressing the power button.
also i can't press the button to open the power manu at all or even to wake it up from sleep.

does anybody knows how to fix this?
do i need to replace it or maybe can just use isopropyl to clean it? maybe just a little adjusment is the cure?
anybody had that problem before?