Crest Whitening Rinse

I have to say that I'm rather disappointed with Crest Whitening Rinse. Crest is a company that I have long trusted my teeth to; many of their other products have been constants throughout my life. However, their Whitening Rinse leaves something to be desired. It does leave you with a refreshing minty taste in your mouth, as most mouthwashes do. And I am impressed by how long-lasting the taste is. But after several months of using this product, I have still not seen any noticable whitening. Perhaps it is more preventative, and doesn't fix the damage already done as effectively. However, I have grown quite frustrated with the utter lack of progress in the whitening department and do not anticipate I will be wasting more money onanother bottle of this product.