In a city like Washington with so many workaholics counting on fast food joints for sustenance, this story has maximum gross out potential: Despite those pervasive bathroom signs directing employees to wash up after using the loo, more than half of all fast-food industry workers don’t bother, according to a new study by the Federal Drug Administration.

Beyond the obvious and very icky implications, the feds are wringing their hands because the lack of hand washing can lead to the spread of food-borne diseases such as hepatitis A and E. coli.