Works very well, use sparingly
I bought five tubes of the gel. I already had the blue light. I wear invisilign braces so I just use the plastic orthodontic trays to put the gel in for my teeth. It only takes a small drop of gel to do the job for each tooth. It is very powerful and you will notice an immediate stinging if it gets on your gums. I just use a wet toothbrush and wipe it off my gums while leaving the tray in. It will turn your gums white if it stays on but it goes away by the next day. Your teeth are noticeably whiter after only one treatment. After four or five treatments about four days apart your teeth will be very white. It will take me well over a year to begin to use five tubes of this gel. I have no complaints. Just use it sparingly, it is very strong.
Rating: 5 stars