I would like to still be noted that with old and serious stains on teeth alone can hardly be right - in this case, you should make an independent cleaning, and only then to adjust and remove light imperfections on their own and at home.
Firstly, it is necessary to forget quite radical and aggressive method, advocated for a long time: brush your teeth only soda in any case impossible. Yes, soda - is undoubtedly a strong and effective abrasive and removes stains very effectively, but the effect on the enamel of teeth in pure soda harmful. Your teeth seem to lose any protection, become thin and almost transparent, so that the ash should be used wisely, and other auxiliaries.
In strawberries, for example, contains a huge amount of different acids which are capable of easily, quickly and effectively dissolve plaque. Strawberries can be applied independently, mash with a fork and causing pulp and juice directly to the teeth, but you can prepare and complete whitening toothpaste and formulations.
For example, baking soda to neutralize the adverse effects to the teeth by using any paste with a high content of calcium. So, take a small amount of paste mixed with soda in equal proportions, add fresh strawberry juice and a bit of flesh, quickly mix and applied to the teeth for about 5-7 minutes. Apply the mixture stands a soft brush with gentle circular movements. After such applications mouth rinse thoroughly and be sure to use dental floss (floss) to remove any residual mass of the gaps between the teeth. It makes sense to rinse his mouth firming balm.
Excellent whitening effect and has a lemon, and for the same reason that strawberries - it contains a lot of fruit acids that break down nasty plaque. Lemon juice can be added to soft paste and applied on a cotton swab and apply to the teeth - the effect is almost instantaneous.