How to reset generation 2 WiFi pods?

My XiFi pods worked fine for 4 months, then stopped working after a router reset. When I try to use the Xfinity app to reactivate them, the app does not proceed beyond the initial step. It seems from the app that the Pod does not come online. I have two pods, and this is the case for both. Ther is no reset button on the pod. Can I access them via the Ethernet ports? How else can I restet them or get them activated?