The iPhone Home Button Alcohol Fix - Works for 4, 4S, 3, iPads & iPods
If your iPhone 3, 4, 4S, iPad or iPod's home button has stopped responding and just won't work, no matter how hard you press or how often you press it, a few drops of alcohol can fix it for good. If you are wondering how that's possible, the logic is simple. Alcohol cleans up the internal metallic terminals that fail to engage when they are dusty, moist or greasy.
Although we tried this fix without any damage to our iPhone and it worked like magic, before we go on to the fix, it would be pertinent to mention here that you are trying this fix at your own risk as there could be some alcoholic products that could damage your idevice. Apple does not recommend it; probably because some kinds of alcoholic compounds could disfigure the screen of your iPod, iPad or iPhone. If you would rather not try this fix, you can try the charger fix and in the rare case when that does not help, simply turn on the Assistive Touch button on your iDevice, which adds a "soft" home button to your screen, till you can get the hard button fixed by Apple or some other repair person.
Now coming back to the alcohol fix, what did we use? Just two drops of nail-polish remover poured directly on that home button did the trick. We switched off the iPhone before we started. After pouring the nail-paint remover, we quickly pressed the button for around 20-30 times, and then wiped off the remaining liquid with a tissue. Then we waited for around 20 minutes before we switched it back on and voila! The home button responded like there never was a problem :-). It has been more than a month now and it's going strong so we are assuming that this is more or less a permanent fix till the innards get soiled again.
This fix could work for iPhone 4, iPhone 4S, iPhone 3, iPad1, iPad2 and iPod Touch home buttons. "Could work" simply means that it depends upon a lot of variables like the kind of alcoholic compound used, how much used and how you handle the DIY fix. We recommend that you bookmark this fix and come back only after trying the iPhone home button charging cable fix first.
This fix is attributed to this video on YouTube: