Gentle brushing after using Crest Whitestrips to whiten teeth is acceptable, according to Crest. Users should not brush teeth immediately prior to applying the strips to avoid irritation to the gums.
Whitestrips remove surface stains and those that are set deeply into the enamel, Crest states. Whitestrips are safe for teeth and do not damage tooth enamel. The strips contain a coating of gel that includes hydrogen peroxide to whiten teeth. The strips keep the gel in place while it works. Crest states that users typically see results halfway through the recommended application time and full results when the application time is complete. Crest offers refunds to people who are not satisfied with the product.