Dip a cotton ball into the lemon juice and baking soda solution and apply it to your teeth. Let the lemon and baking soda solution sit on your teeth for around a minute. Brush your teeth to remove the acid. I saw results the first time I tried this.
"I used to do this in college...then I got lazy...should try again! Want to get a healthy skin without going to the spa? Here's how you can achieve the spa-like experience at home with the easy steps! Enjoy!!" Worth a try!