What way is the best way to whiten your teeth?

Whitening Strips, Trays, Etc. If you can help me please provide a specific answer
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I used Crest White Strips this year. My teeth were always a hazy shade of yellowish-white beforehand and I wanted to try to whiten them up. Right now there are about 100 different white strip varieties. Some, like the original, you have to apply a messy strip and leave on for 30 min, others are only 3 minutes and have a nice mouthguard shape. However, the original white strips are $10 or more cheaper than the newer ones and that's saying something seeing how the original ones still cost between $20 and $30. After using the original strips twice a day for 2 weeks I noticed a dramatic difference in my teeth color. I highly recommend them if you can commit to wearing them every day.
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