what is the best whitening system i have had stains in spots on my teeth since they grew in i want white teeth

i need something that with totaly bleach my teeth white
--------------------
I have tried pretty much every whitening kit on the market and it has only made my stains worse. I guess your teeth can respond differently to the treatments so some might get whiter than others. Unfortunately, after spending hundreds of dollars, my dentist could not fix the damage I had done with those home kits. I wish I would have never used them in the first place so if you are serious about getting your teeth whiter in an even tone, see your dentist. P.S.: If you do not use the bleach correctly and let it get on your gums too much, you can actually get a very painful receding gum line. This will eventually result in your teeth falling out.
Source