That Greek salad you got from the deli had a mess of red onion mixed in it. It was tasty, but now your breath smells like an onion farm! Here’s a quick, low-cost fix: Mix one-half teaspoon of baking soda into a cup of water, then swish it around your mouth one gulp at a time. Spit out each gulp after about a minute of swishing. (Be careful not to swallow this mouthwash.) By the time you’ve rinsed your mouth with the entire cup, your breath should smell fresh and onion-free.

More self-cleaning tips…