Reason 1: The machine is slanting.
Solution 1: Adjust the machine to be even.
Reason 2: The laundries put slantingly in spinning.
Solution 2: Reorder the laundries and close the top lid.
Reason 3: There any foreign materials.
Solution 3: Remove the foreign materials.
Reason 4: Is the Filter fall off?
Solution 4: Please install the filter.