How Do You Do a Hard Reset on Chromecast Ultra?
When you reset a Chromecast Ultra, the equipment is returned to its original factory state.
Any customization is lost, and its removed from yourGoogle Home.

Heres how to reset a Chromecast Ultra:
initiate the Google Home app.
Tap themoreicon (three vertical dots).
Wait for the process to finish, and the Chromecast Ultra will be reset and removed from your account.

How Do I Reset My Chromecast Ultra to a New Wi-Fi?
Push the reset button on your Chromecast Ultra.
Hold the reset button down while the indicator light blinks orange.

When the indicator light turns white, release the reset button.
Your Chromecast Ultra is now ready for setup and connection to your new Wi-Fi web link.
Where Is the Reset Button on My Chromecast Ultra?

The Chromecast Ultra reset button is located right next to the indicator light, near the hard-wired HDMI cable.
TapSettings(gear icon) >More(three dots) >Factory Reset>Factory Reset.
Be aware that this will clear all your data and can’t be undone.

To reset your first-generation Chromecast, pop fire up Google Home app, tapDevices, and select your equipment.
TapSettings>More>Factory Reset>Factory Reset.
Alternatively, press the button on the backside of the Chromecast until the LED light starts flashing.
The TV screen will go dark as the Chromecast resets.
Plug in the Chromecast and download the Google Home app.
pop swing open the app and follow the prompts.