The Best Tooth Swabs
GoSMILE Smile Whitening System
“Easy and fun to use,” these were a hit with impatient testers, who began to see a difference right away (just rub the end of the swab on each tooth).
Time commitment: Two minutes to apply, plus 20 minutes without eating or drinking, twice a day for a week.
To buy: $89, gosmile.com.