To combat poor hygiene, we designed Wash To Unlock. A modified portable toilet that wouldn’t let you leave unless you washed your hands with Sanytol.

The branded soap dispenser inside the toilet was connected to the door lock through sensors operated by a seamlessly integrated Raspberry PI. If you tried to leave without washing your hands, the toilet wouldn’t unlock. Instead, you would hear an audio message informing you about the diseases linked to poor hygiene.

By placing Wash To Unlock at popular farmer’s markets during springtime, Sanytol reached over 10.000 people per weekend. And every single person who visited the toilet washed their hands.