You see, drink machines at fast food restaurants mix the soda and flavored syrup on the spot as it comes out of the fountain, instead of coming out as the ready-to-drink mixture you get from a can.

Biofilm, or pink slime as it’s commonly called, is a frequent sight on ice machines, soda fountains, toilet bowls and as buildup anywhere near water.

MEMPHIS, Tenn. — Don’t let the pink color fool you — there’s nothing “cute” about biofilm, otherwise known as “pink slime.”It’s a frequent sight on ice machines, soda fountains ...