In a prior post a question was asked about teeth whitening home remedies. Although a few home remedies was stated it was also best advise to see a dentist in order to get your teeth their whites and to whiten you teeth with out any risks to them.
Yet it is understandable that many people may not be able to afford having their teeth whiten by a dentist. If you are going to try any home remedy, understand that you do run the risk of doing more damage to your teeth in the along run.
Trying looking into some of the over counter products that are not so costly. Like tooth paste with whiting, mouth wash with whiting, gum with whiting.
Try speaking to your dentist in order to get advise on what he/she may advise for you. A good dentist will advise you on what you can use to help whiten your teeth. They may still tell you only they can do it the best (which would be true) but they still will tell you other ways if asked.