Prepare an iOpener and lay it over the lower edge of the digitizer to loosen the adhesive holding the home button gasket in place.

Wait about two minutes before moving on to ensure the adhesive has adequate time to soften.

Flip the digitizer panel over and gently push the home button up out of its slot in the front panel.

Push slowly and apply just enough pressure to slowly separate the gasket from the glass—if you push too hard the gasket will rip.