A household case links lunchtime Zigbee sensor dropouts to microwave interference. After checking the coordinator’s placement, the author changed Zigbee from channel 20 to 15 and reported no recurrence during ten days of personal observation. Comparing sensor behavior with interference timing in logs is a useful diagnostic approach. However, a new channel can create interference depending on Wi-Fi channel placement, and some devices may need to reconnect. This is not a recommendation for every household to use the same channel.