Respeaker Core V1.0 total factory reset, how do I do it?

I have tried firstboot command in ssh terminal. I have copied the firstboot script to the sd card (freshly formatted with sd card formatter), named the file “autorun” and tried a reboot with sd card inserted. I am not sure about soldering wires onto the card but then again I can ssh in so why would I need to ?

But, why do these previously tried reset methods not work ?