1. Poor cleaning effect: The nozzle and rotary arm inside the dishwasher may be blocked or damaged, or the cleaning agent is insufficient or expired and needs to be replaced. 2. Water leakage: It may be that the water pipe joint inside the dishwasher is loose or aging, or the door sealing ring is damaged or needs to be replaced. 3. Abnormal sound: It may be that the internal parts of the machine are worn or loose and need to be repaired or replaced. 4. High power consumption: It may be that the energy level of the machine is low, and a more energy-saving dishwasher needs to be replaced. 5. Fouling: Fouling may occur after long-term use. Special cleaning agents can be used for cleaning. Citric acid or vinegar can also be added every time to prevent scaling.