1) Open all the doors in your home before the robot starts cleaning to ensure the path is free of obstacles. 2) Verify whether the missed areas are the same each time. a) Same areas: let the robot start from the missed areas when it's cleaning, and inspect the surroundings, since factors such as a high doorsill, dark ground, and direct sunlight could lead to missed spots. b) Different areas: tidy up the scattered objects on the ground, such as power boards, toys, slippers, etc., which will increase the cleaning coverage of the room. If the robot bumps into things frequently during cleaning, it may cause missed spots.