This happened to me and I contacted Tech after doing everything they said, Q-tips on the sensors, compressed air lightly on the laser. In my situation one time after six months of flawless use I had a additional table set up in my living room and then it was removed the next day. This apparently is what caused the issue. The map was updated with that table and once I remove the table everything went crazy. I tried moving the unit And even updated the software on the unit itself. It wasn’t until I sat down and took a step back and erased the floor plan, everything has been fineEver since