Nest Hub Max is a countertop smart display typically used in kitchens and family spaces for timers, video calls, cameras, and smart-home control. "Ghost touching" usually indicates a failing touch digitizer, pressure damage, moisture intrusion, or electrical noise from the power supply.
Because the touch layer is integral and parts availability can be limited, repair viability depends on whether the issue is power-related (try a known-good adapter/outlet) versus a damaged digitizer. Repair is worth considering if the device is otherwise stable and the problem is clearly tied to a replaceable power adapter or simple connection issue.
Replace becomes the practical option when phantom touches persist across power sources, the screen is delaminating, or the device reboots unpredictably-those symptoms often point to internal component failure where labor exceeds value. If the unit is older and software support is a concern, replacement can also restore a smoother daily experience.