Many people choose whitening to improve the appearance of their teeth. Whitening is one of the least expensive cosmetic remedies available to enhance a faded smile. It can be done at home or at dentist office, using a variety of products & techniques. Home bleaching is an alternative to bleaching in dental office. Custom-made mouth trays made of thin, flexible plastic that you will fill with whitening gel & then leave on your teeth for a prescribed period of time.
Big culprits of extrinsic or external staining are tobacco, either smoked or chewed, & foods such as red wine, coffee & tea.
You can make the brightness last longer by avoiding the foods & habits that cause staining.