"Falcon recommends pouring a bucket of hot water into its urinals to flush out deposits before putting in a new cartridge." (http://www.wired.com/magazine/2010/

"Falcon recommends pouring a bucket of hot water into its urinals to flush out deposits before putting in a new cartridge." (http://www.wired.com/magazine/2010/06/ff_waterless_urinal/2/ http://www.wired.com/magazine/2010/06/ff_waterless_urinal/2/) Maybe it would make sense to make a hybrid version option that flushes with water every x days. Attacks the idea of pure "waterless", but maybe more practical?