So for the first time in my life, I'm a regular Listerine user (all past and present lady-friends altogether now "It's about time!"). The thing I can't figure out is on the back, it says to use about "4 teaspoons". Why can't they just put somethin like "half a cap" or "take a swig and swish"? Do people really bust out their measuring spoons to divvy up their Listerine?