Visible dirtiness / product design

Every time when you wash your hands, do you think of your hands, is clean or not finally? This kind of concept taps design, utilizing high and new optical detection technology united with the tap, in this way, when we wash our hands we can clear to see if our hands is clean or not, besides, washing hands is one of the best ways to prevent virus infection. Applied this kind of new concept tap design in the public places, the effect of preventing the virus infection comes out.