Zoom teeth whitening: ask for one 20 minute session, immediately after bleach is wiped, apply a flouride based desensitizer so peroxide doesn't continue to penetrate the enamel - method for sensitive teeth.
If you swish with hydrogen peroxide everyday you will have the same results plus excellent gum tissue! Recommend swishing with peroxide for minutes morning and night. It kills bacteria that causes decay, gingivitis, periodontal disease. Worth a shot!