lol this is too funny- I was just looking into this the other day- you might get a couple of shades 'whiter' (Read, less yellow) by using somethign liek Crest WhiteStrips, but watch out, they can cause tooth sensitivity, but brushign with desensitizing toothpastes after should help- but don't expect too much of an improvement. Also, careful with home remedies liek lemon
juice as they suck calcium from the teeth which is what makes teeth offcolor-hence why it works to 'whiten teeth'. The safest at home route is to go with hte crest whitestrips, and make sure the strips don't touch the gums too much. The whitening will only last a couple of months, but will go back to natural offcolor teeth color around that time so you'll always be 'touching-up' along htew way to keep them whiter-. All those pearly white teeth ya see on TV those folks are blessed with teeth that tend toward a real white anyways- the rest of us have teeth that are more naturally off color.
The stains on the surface of teeth can be overcome, but it's the natural color underneath the enamel that will determine how white your teeth can become really