Chemical burns under lip [SEP] I would have posted a picture but it looked too graphic to post online.<br /><br />I went back and forth for weeks debating whether or not to purchase this product.  I had gotten my teeth professionally whitened at the dentist a few years ago and it worked beautifully; however, could not justify spending several hundred dollars on doing it again.  In lieu of spending a ton of money on professional whitening, I researched at-home whitening kits.  Glo seemed to rank high with at-home whitening kits and Amazon offered a coupon for it so I had finally decided to go for it.<br /><br />I received the item pretty quickly and charged it right away.  The first 2 days were fine, albeit tedious.  On the 3rd day, I started to get a sensation on the underside of my top lip even though I applied the lip balm generously.  By the 4th day, the burning sensation was intolerable but I pushed through it until I finished the session.  By the end of that 4th day, the pain was enough for me to decide not to continue using the product.  I flipped my top lip up and there is a long, white burn all the way across the length of my lip.  It lines up exactly the way the gel would leak up out of the mouthpiece.  All this for not even a slight change in the shade of my teeth.<br /><br />I am returning this product and applying the money towards real professional teeth whitening at the dentist.  I gave 2 stars for quick shipping, nice storage case, and the option to be able to return product.