If you want really to try crest teeth whitening strips, they make your teeth look whiten. Crest teeth whitening strips are gel-based they spread strip and place on the surface of your teeth. Crest teeth whitening strip removes up to 14 years of staining best way to apply once a day for 30 minutes. They protect your teeth at home and enamel-safe teeth and protect your gums. Achieve professional-level teeth whitening results in days, in the comfort of your own home and without the hefty professional price tag!