Rose
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        I´m mexican too and Ihave the same problem, I´ve searching for information about,I´ve read about Chlorine Dioxide,   I´ve never tried it but It´s chemical  biocide that kills bacteria and it is used in some industries to rid off bad odor and bacteria in waters, it was  proven scientifically, now some doctors   are using this component in some mouthwash and oral products.     I´ll getit as soon as possible.   April 1st. 2004