Need help factory resetting a Nozomi NS1 (no account info)

Hi everyone,
I’ve recently taken over a site with a Nozomi NS1 device, but there is no account or credential information available.
I tried using the reset pinhole (both while running and during power cycling), but it didn’t trigger a factory reset.
Does anyone know the correct procedure to factory reset an NS1?
Any help would be greatly appreciated. Thanks you so much.