If the sleeve on your EXG sensor's cable has begun to loosen or strip slightly, there's an easy fix. This occurrence is typical and doesn't indicate a malfunction.
To remedy this, follow these steps: Start by carefully sliding the sleeve back towards the connector end. Once you have the sleeve positioned close to the connector, gently press it underneath the connector's casing to secure it in place. Should the sleeve come loose again in the future, simply repeat these steps to fix it.