Whether you're getting rid of a smarthome device in your house or just don't want to use Alexa with it anymore, here's how to remove a smarthome product from your Alexa account.
This same method also works with disconnecting a device from your Echo Plus, which has its own built-in smarthome hub to connect devices directly to it, like Philips Hue bulbs.
Start off by opening up the Alexa app on your phone and tapping on the menu button in the top-left corner of the screen.
Select "Smart Home" from the list.
Scroll down until you find the smarthome device that you want to remove from Alexa. Tap on it when you find it. In this case, I'll be removing one of my smart plugs.
Tap on "Edit" in the top-right corner of the screen.
Hit the trash can icon up in the top-right corner.
Tap on "Delete" when the confirmation pop-up appears.
Once that's done, you'll receive a blue banner at the top of the screen telling you that the device has been removed from Alexa.
You'll still be able to use the device and control it from your phone using its accompanying app (unless it's a device that was directly connected to an Echo Plus), but you will no longer be able to use Alexa with it, either from with the Alexa app or with your voice using an Echo.