There are old & redundent nodes on the Genius Hub

1. A customer has emailed to say that there are old devices which no longer are used and no longer work / have been returned on their system (such as showing errors on rooms)
2. You are supporting a customer and during the discussion discover that there are old, redundant devices (such as those been replaced)

Step-by-step guide

1. Go to the Advanced Settings page on the customer's system
2. Click on the 'dead node'
3. Click on 'Test node'
   1. Allow a few messages to go through AND fail
   2. If messages do not fail, the device is still on the system and this will not work
   3. Close the testing dialog and click 'Remove dead node'
   4. Wait until it says 'Successful in the log