Believe it or not you can try a "pipe cleaner" such as this http://www.amazon.com/Chenille-Kraft-Big-Pipe-Cleaners/dp/B00A6VWMYK and it will sometimes resolve the issue. My buddy had an issue on a non iPhone and this resolved the problem. You can get these at like Wal-Mart etc. The lint etc. from pockets can sometimes cause the issue. Its worth a shot. The above link is just an idea of the pipe cleaner. I'm sure you can get them for much less for 1 or a small pack.