When you go into the bathroom at a fast food joint, you're not expecting a palace. And that's good, because you ain't getting one.
And while no chain got more than 65% of people saying their bathrooms are clean, these five scored the best: Chick-fil-A . . . Culver's . . . Potbelly Sandwich Shop . . . Whataburger . . . and Caribou Coffee.
And the five chains with the FILTHIEST bathrooms are: Sonic . . . Popeyes . . . Little Caesars . . . McDonald's . . . and Jack in the Box.