For the last few months my iPhone’s home button has been unresponsive. Double clicking would often take me to the search pane and not the multitask bar. This is getting to be very annoying. I’ve been hoping that the button would hang on until the iPhone 5, next summer, but in the last few weeks it seems to have got worse. So much so, I’d even started to use the assistive technology in the iPhone to by-pass the requirement of using the home button.
Doing some research this morning, it appears that the button is a serviceable part that Apple can replace in-store but there were also claims that sometimes the problem is causec by particulates that get into button via the connector port. Blasting air or vacuuming the connector port can fix the problem. Although it sounds ridiculous, blowing very hard into the connector port seems to have fixed it.