Recently I noticed my volume buttons being veeeeery sensitive. All on the "up" side. I am using otterbox case, and lowering volume is rather hard, unless I press the veeery edge of the "down" button. I got curious, and removed the case. I put my finger on the left edge and simply moved it across. The simple act of barely touching the volume controls made my phone think I pressed and held the "up" volume button. Thoughts?