For those looking: Fig 4a, the right 2 designs are the winner. https://academic.oup.com/view-large/figure/512223725/pgaf087f4.jpg https://academic.oup.com/view-

For those looking: Fig 4a, the right 2 designs are the winner. https://academic.oup.com/view-large/figure/512223725/pgaf087f4.jpg https://academic.oup.com/view-large/figure/512223725/pgaf087... I do recall there was another story of putting a "target" at the right place in existing urinals significantly improved cleanliness