Whitening for Sensitive Teeth

I had heard good things about Crest Whitestrips and wanted to try them, but have sensitive teeth.  My solution was to change the application protocol.  The package insert says to apply the upper and lower strips for 30 minutes twice a day.  I used an upper strip for 30 minutes once a day on day 1 and a lower strip for 30 minutes once a day on day 2.  This alternating once a day technique worked great.  The whitening effect was much better than other over the counter products I have tried, and I had no sensitivity problems.  Of course, I continued to use toothpaste formulated for sensitive teeth.