How a picture of a fly reduced washroom cleaning costs by 8%

Men’s lack of precision when aiming into the toilet increases the cleaning costs of public washrooms; Amsterdam’s Schiphol Airport was no exception.¹ The airport wanted to improve urinal aim to reduce total cleaning costs. As a simple and inexpensive way to achieve such goals, Schiphol Airport introduced its urinal flies.

By etching an image of a fly inside every urinal, Schiphol Airport hoped to nudge men to aim at the fly improving overall aim.¹ Implementing this physical design change reduced spillage by 80%, and the budget for cleaning public toilets by 8%.