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When users use cleaning agents to wash their hands, they spray bubbles with untact products without direct contact through infrared sensors on the dispense.
The timer applied to the top of the cleaning agent at the same time as spraying tells the user how long he or she has been washing his or her hands.
It is a hand cleaner product that helps prevent infectious diseases by inducing hands to wash for more than 30 seconds
Gyeongsan , South Korea
sung chul Bae,