If you are experiencing any of the following issues you may need service.Volume lower than usual or no soundDistortion, static or intermittent sound.Sound is missing frequenciesSound is out of phaseFor 2-pin cables remove cable by grabbing very close to the body of the in-ear monitor to prevent damageFor T2 cables  disconnect cable from your ear piece, pull the plug straight to avoid damage to the sockets. 1.   Please check for buildup of wax/debris on the outer shell and the sound ports at the end of the canal, if debris are found use a microfiber towel or antibacterial wipe to clean the outer shell and the provided cleaning tool to remove any wax buildup in the sound ports.  Alternatively you can purchase a Jodi-Vac to help remove wax/debris from our store HERE..  Also if you sweat a lot sometimes filters can soak up moisture, we recommend purchasing a desiccant container to help extract moisture from your in-ear monitors after each usage.2.   If after cleaning the in-ear monitors you still have a sound issue check to see whether its one side or both sides that are malfunctioning/working at all.  If its one side that is out, switch your cable connections from one side to other.   2a.     Now test them again after you have switched the cable ends(for 2-pin make sure blue and red indicators are facing up OR for T2 gaskets on cable ends are black for left and red for right.), if you can now hear sound of the opposite side you have a bad cable.  If cable is under warranty please contact us about replacing it, if its out of warranty a replacement can be purchased in our store HERE.3.   Try switching to a different audio source to confirm that it is not an issue with the original audio equipment, or try listening to a different song.If none of these troubleshooting steps resolved your issue, please fill out a REPAIR FORM and send your in-ear monitors into our office at:InEarz Audio170 N Cypress WayCasselberry, FL 32707