the crest renewal strips work really well. toothpaste and mouthwash r not on your teeth long enough to make them white. some mouthwash u have to watch out for they will stain your teeth brown especially between the teeth. crest prohealth is one of them. ill have to look up the ingredient that does it but its the one that has the highest precentage on the package. kills germs very well and stains the teeth..