Fresh Enough?

So am I getting 24 hours of protection or just 12?

If I have to rinse with Listerine twice (in twelve hour intervals) in order to achieve 24 hours of protection, then surely the claim of 24-hour protection is disingenuous. Why not say 72-hour protection, or even longer. As long as you keep topping up every 12 hours, you can have Listerine protection until the bottle runs out!

Thanks to T-Money, a reader from Milwaukee, for noting and sharing this quirky observation with us!