BillQuintrell
Hello.
It is very important for us not to lose the data of our clients. Therefore, there is no way in our interface to easily clear device messages.
The clear button in toolbox(messages & logs) just clears the data in the UI for easier debugging (this is not a bug, but a feature).
However, if you want to delete all messages from a channel or device (we recommend using devices to store messages), you can specify in the channel/device settings messages_ttl = 0 sec., then the entire message history will be cleared (not instant operation).