If you are experiencing problems with your UE Pro Custom In-Ear Monitors such as intermittent sound, lack of sound in one earphone, static or distortion the problem may lie within the cable and not the earpieces themselves. To fix this problem, detach the cable where the cable and custom in-ear monitor meet. Hold on to the thickest part of the cable and the Custom In-Ear monitor. Apply a little pressure and pull the cable out. Once the cable has been removed, reverse the cables and insert back into the earphones. If the same problem happens in the different ear, a new cable may need to be ordered. Purchase cables here, call 800-589-6531 or email email@example.com to request a new cable.