Most often you see home button of iPhone becomes slow to response, delays, and unresponsive when you tap it. This could be related to hardware issue, and reason for this happening is moisture generated in pad, dropping phone or some other possible issues. As result, this home button gives delay, lags and becomes unresponsive at time. If this issue is just started to your phone, here you will see some guides helping you to fix it.
First of all, open default iOS application in your device such as calculator, weather or any other.
When it opens, you just press and hold down the power button until the “Slide to Power Off” dialog appears, when slide to power off appears you will release the power button.
Next step is to press and hold the home button, after sometime the slide to power off screen will disappear, it will force quitting the application.
These steps look awkward, but they work actually. You will see change in response of home button. This procedure also helps the iPad and iPod touch home buttons as well, but if you still find problems, it needs to be repaired then.