1. Turn off the power of the washing machine, open the cover of the drum washing machine and unscrew the screws at the bottom.
2. Remove the blade after unscrewing the screws, and unscrew the four screws at the bottom.
3. Unscrew the outside of the cover. Open the laundry detergent box. In the third box, there is a piece of green plastic paper with MAX written on it. Then press that place to take down the laundry detergent box.