FI and I get our braces off in September and FI wants to whiten his teeth before our epics. I see deals all the time on groupon, gotta half it etc. Please recommend your "teeth whitening place" or share what you do at home. I have heard crest white strips work... does anyone use those or something else like it? What really works? We are also limited on time so it would have to whiten within just 2 or 3 weeks...TIA!