Welcome to the Wyze User Community Forum @harry43! 
@WildBill has the best (only) solution without a new Setup on every device. But don’t delete them from the App.
What would be REALLY nice for when an SSID or Password change is unavoidable, is to be able to just log into the App, go to a “NETWORKS” page (doesn’t exist…yet) that lists all my devices sorted by which Network SSID they are installed to, click that network and be able to EDIT the SSID and Password so that each device there is then updated with the new credentials. At a minimum, it would be nice to at least edit this in the Device Settings for each.
Vote for this Wishlist request if you agree: