Can you tell me about best teeth whitening at home?

Crest white strips: After brushing and flossing your teeth, crest white strips work well. If you don't get the results you desire, then i would recommend talking with your dentist about in office whitening.

Bleaching teeth: Crest white strips can work, though they only cover the front 6 teeth, so if there is a big color change, it may be very noticeable compared to the back teeth. Avoid using any product that requires a "pre rinse" as this is usually acidic and can destroy tooth structure as well as make them more sensitive. A kit custom made by a dentist is the most effective method.