Before that, I tossed out a second non-functioning Xiomi robot vacuum in favor of a DEEBOT OZMO 900, reasoning that if it had more features, the reviews would be more positive and justify the higher cost. I was unable to discover a solution online that did not involve completely disassembling the robot vacuum cleaner or taking it back to the repair center. Please, if anyone else has this issue, share your solution with me. You don't even need to say reboot; prior to that I guessed and, among other things, reinstalled the application and all of its settings. Nevertheless, I've only had a vacuum for a total of three days thus far.