If you notice that the sound of your Redmi Buds 6 Pro decreases after using them for a period of time, where the volume becomes noticeably lower, it is recommended to take the following steps. First, clear the Bluetooth connection on your device and search for the earbuds again to pair them. Reconnecting often resolves temporary sound issues. If the sound remains low even after following this method, you can try restarting the phone's absolute volume switch. This function controls how the earbuds and phone synchronize their volume levels. Ensuring these steps are followed can help restore the earbuds' sound quality and improve your listening experience.