How to clean a flat mop

Need to prepare: water, basin, baking soda and detergent.

1. First, add a proper amount of baking soda to a basin of clean water.

2. Then add a proper amount of detergent to the clean water.

3. Put the flat mop into the basin and rinse it clean.

4. Then rinse the flat mop with clean water.

5. Finally, clean the flat mop, as shown in the figure below.