Using the reseting magnet in the proper place you can rest any our device. In the dvices manuals is written where are the specyfic places where you should place the reseting magnet and reset the device.
After you reset it it is required to configurate it - like a new device.
Next what you can do is to configurate the device agiain. You can just connect with device WiFi and open WiFi list. Next choose your home WiFi router and conect again with it.
The full video how to configurate it again is here:
https://www.youtube.com/watch?v=Fem1xXyuhvc