Suddenly, my mother found some oil on a bowl, which could not be washed clean with water. My mother will take out a rag and scrub it with detergent. I saw my mother frowning, her eyes staring at the stains in the bowl carefully, holding the bowl with one hand and scrubbing it with a proper amount of detergent with the other. I saw the detergent dripping on my mother's hands with repeated washing, showing colorful bubbles under the sunlight. Finally, when mother washed the foam off the bowl with clear water, the stain on the bowl disappeared. Only a pile of washed bowls are stacked together.