Home button not working, but OK after OFF/ON or power attached
My wife's iPhone had sporadic issues with the home button not working, but after switching it off, then on again, the problem could be remedied. Also switching on when attached to iTunes via the cable worked. Now it has gotten worse to a point where the problem happens daily. At the moment, the most reliable way is to attach / detach the charger cable one or two times.
Apple official procedure (going to standby via standby button and waking it up via home button) doesn't work, neither does going into an Apple app and pressing home for a couple of seconds.
After it works again, there is no indication that home button hardware is at fault - when it works, the button is responsive everytime, no wiggling, no need for firm pressing etc.
Does it make sense to replace the home button under these circumstances? Could it be a power issue?