I've noticed something odd/annoying:  Every night around 1:30 AM Central, a new device joins the network.  It is labeled "Unknown" and is offline.  Each one has a different MAC address.  2 things:

1.  What is causing it?

2.  Any way to multi select offline devices and "remove" them from the list instead of doing it one by one?  I have probably 20 entries of Unknown devices that are offline.

I may have another question concerning Ring and the Decos but that's for another topic.