Sorry if this is not the right place for my post, but I couldn't see another category that suits

I've got a chrome cast that I've had for about 3 years but I've not used it recently

thanks to Vodafone we got the 'Deco'? wifi things  last year and have set them up and we have a new wifi password.

However in the weekend I tried to use the chrome cast but I couldn't get it to cast - I think it might be because the chrome cast was set up with the old wifi password?

Does anyone know if this would be the case - and if the chrome cast needs to be 'reset' (and how to reset it if necessary)

thanks in advance