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Choose a mouthwash that lists hydrogen peroxide as an ingredient and swish it in your mouth for 1 full minute. Then, spit out the mouthwash and brush your teeth. Stick with the mouthwash for several weeks before you notice whiter teeth. Because everyone's idea of what "natural" is can be different, read ingredients on the label to avoid products that contain things you don't want, such as artificial flavors, fragrances, colors, sweeteners, and preservatives, or make your own toothpaste. If you're buying toothpaste, ensure that the package says it's ADA (American Dental Association) approved. Squeeze the toothpaste onto your toothbrush and gently scrub your teeth using circular motions. Take time to brush the sides and top of your teeth to remove plaque. If this sticky substance builds up on your teeth, it can make your teeth look yellow and cause bacteria to thrive. Then, rinse your mouth with water.  Remember to replace your toothbrush every 3 months so the bristles effectively loosen plaque. Bacteria can grow on your tongue, so don't forget to brush your tongue after you finish brushing your teeth. Buy any type of floss you like, whitening or not, and floss between each tooth at least 1 time a day. Flossing removes hard-to-reach plaque that makes your teeth look yellow. Since floss can be made from different materials, try a few different types to find out which kind you prefer. Your morning coffee, afternoon tea, and evening red wine might all be staining your teeth. The good news is that by limiting beverages that stain, it will be easier to clean and whiten your teeth naturally. Try drinking these liquids through a straw so you're not coating your teeth with them. You may need to let hot liquids cool down a little before you do this. Smoking just a few cigarettes a day can turn your teeth yellow. If you smoke even more, your teeth may become brown or black, so take steps to quit. If you're struggling to drop the habit, join a local support group or try smoking cessation programs. These programs can help you kick the habit and protect your teeth. You should also avoid chewing tobacco since it stains your teeth and contains abrasive ingredients that wear down your enamel.

Summary:
Use a mouthwash rinse 2 times a day before you brush your teeth. Choose a natural toothpaste if you want to avoid artificial ingredients. Brush your teeth for 2 minutes twice a day to remove surface stains. Floss your teeth once a day to prevent plaque buildup between your teeth. Cut back on drinking liquids that stain your teeth. Quit smoking to prevent nicotine from staining your teeth.