Comment by ButlerianJihad

> gotten the connection details from my wife’s phone

> went digging in UniFi, found it, and blocked it

> still connected to my WiFi

Is your wife's phone also Samsung? Do Samsung phones have a habit of sharing WiFi passwords amongst themselves, or other devices with a Samsung Account? Do Samsung Accounts still exist? Is your fridge blocked, or is it still connected? If you change your WiFi SSID or password, does the fridge acquire it anew, the same way?