As with all routers, resetting your eero(s) can be a useful troubleshooting step. We generally recommend deploying simpler steps—such as power cycling your eero by unplugging its power cable, waiting 30 seconds, and plugging it back in—before attempting a reset.
If you do need to reset your eero, you can do so through the eero app or by hitting the small reset button located on the back of the device (1st-generation), pushing the reset button on the back (2nd-generation), or pushing the reset button on the bottom (eero). The eero Beacon reset button can be found on the left side and the same instructions below apply. Before resetting your eero, make sure it has been powered on for at least 45 seconds.