Through the study of the mode of virus transmission, hand washing can effectively reduce the risk of virus infection. Inadvertently rubbing hands after washing hands can cause the remaining water to encounter the wind and become an environment where bacteria may breed. "Cleaning Wizard" is a product that integrates hand cleaning, paper towel recycling, drying, disinfection and process for children in the post-epidemic period. It guides children to wash their hands correctly, forms the habit of thoroughly clean hand washing, and protects children's healthy growth.

As a student work, there are certain techniques, concepts, and lack of thinking on the ground. I hope to be tolerant and look forward to the communication and sharing of the great gods.