My iphone 4 home button has been losing sensitivity gradually the past couple months and now I basically have to mash it to work. I use the assistive touch feature for now but I just find it annoying more than anything. Is there any way i can fix it either myself or through apple? I've tried restoring it and the power off screen trick, but have had no luck so it must be a hardware problem. I got it at launch over a year ago. Thanks.