Splash-back is at its worst when the urine stream is angled perpendicular to the urinal wall. According to one of the researchers, Randy Hurd, the best option to prevent splash-back is to "aim at the sidewalls of the urinal." He also suggests that gentlemen stand closer to the urinal.
How do I stop Splashback when I pee?
Pee splashback is caused by two main factors: height from the toilet/urinal bowl, and the “angle of attack.” By far the best way to reduce splashback is to alter the angle of your pee stream so that it hits the wall of the toilet/urinal at a gradual angle; the closer to 90 degrees, the worse the splashback will be.6 nov 2013