If your hands are dry and itchy, the skin cracks, and sometimes it is raw and it bleeds, wash your hands with hydrogen peroxide at least twice a day for several days. This symptom is usually caused by the athlete’s foot fungus or ringworm of the feet (tinea pedis). If a white, dry, powdery residue remains on the skin of your hands after washing with hydrogen peroxide, don’t worry. That is the layer of dead ringworms. After several days of washing, the previously dry skin will become smoother, and the raw cracks will heal. A combination of hydrogen peroxide and baking soda is a good toothpaste that will whiten the teeth and reduce tobacco stain. A more powerful combination to whiten teeth is a mixture of lime and baking soda. Put some baking soda on a small plate, then cut open a small lime and squeeze the juice onto the baking soda. The baking soda will produce foam and release oxygen. Place the mixture on the teeth and let it stay for a few minutes, then brush your teeth with whitening toothpaste or with a mixture of baking soda and hydrogen peroxide. One can also use baking soda and vinegar instead of lime juice and hydrogen peroxide.