13. After been successfully used for a while, my Amazon Alexa or Google Assistant is unable to control Meross devices.

A: Have you ever renamed your device or newly added a device?

If the answer is "YES".
For Amazon Alexa users: Amazon Alexa does not support device list automatic refresh function. However, if you want the renamed/newly added device to be alive immediately. You can manually add the device via Amazon Alexa app or simply use "discover my device" voice command.
For Google Assistant users: Google Assistant refreshes its device list automatically. You can unlink your Meross account and then link it again via Google Home app to initiate the device list refresh action manually.
If the answer is "NO".
Normally, this case rarely happens. However, when it happens. Please go through the setup steps one more time.
1. Reset your Amazon Echo or Google Home device and setup them once again.
2. Unlink Meross account and then link it. If this way still not works, there may be something wrong with either Amazon/Google or Meross side. Please email us at support@meross.com. We will solve it with the highest priority.