1. After using it for a period of time, the phenomenon that it does not turn is that the pedal is stepped on and the barrel is turned, but the return is not timely. At this time, the ruler can be removed, and the six or seven teeth on the upper and rear ends of the ruler can be flattened with a knife, or replaced with some new rulers.
2. If the foot can be rotated, it means that the mop bucket is OK, and the mop rod is broken. This situation cannot be repaired, and only the mop rod can be replaced with a new one. If the pedal does not rotate, it is likely that the one-way small bearing has been damaged or slipped. Replace the bearing to solve it.
3. If you are swinging the barrel, but the foot pedal does not return, it is likely that the spring elasticity is insufficient, or the gear set is too frictional, and the pinch and lock may occur. You can purchase a spring to replace it. First, use a common screwdriver to remove the foot pedal, and then use the hexagonal inner buckle to remove the red big gear. Remove the ruler, and then reinstall the new spring on the bayonet of the ruler.