The major points of this:

> The cnssdaemon.log file grows continuously and cannot be deleted through the AP CLI.

> Delete cnssdaemon.log file (Access Point devshell): This process involves accessing the Access Points devshell to manually remove the cnssdaemon.log file. Note that this requires administrative access and coordination with TAC to enter the devshell environment.

TAC is Cisco's customer support.

So Cisco isn't giving you full access to your hardware. One you buy something, there should be nothing that the manufacturer can do to it that you can't.