Nuke your Alexa smart home to get rid of 'ghost' devices

If you have more than a couple of smart home devices, you've probably renamed them a few times, moved some to a different room or otherwise changed their original configuration. And if you're anything like me, I bet you forgot to update Alexa. Unfortunately, you'll get a stark reminder when you attempt to control those "ghost" devices with a voice command -- try telling Alexa to turn a smart light on with a name it doesn't recognize and you'll see what I mean.