Apple is quickly addressing cases of iPhone touch-screen troubles as users continue to report that part of the screen becomes unresponsive. Owners of problematic iPhones are comparing failing touch-screens in numerous cases, concluding that most phones are losing touch sensitivity in a half-inch strip that spans the width of the phone when it is held vertically, according to AppleInsider. Apple is working hard to replace faulty units, according to several customers, and is offering rental iPhones while the three-day repairs are underway. Many iPhone owners were unable to fix the issue by resetting the software, and some cleaned their handsets using Apple's recommended method but were still left without touch functionality within the dead area.