Well even after saying this product does not work well I researched a bit more . If you have not had your teeth professionally cleaned recently this product will not work as tartar and plaque will not whiten. So I wasted my money then, now that I have had my dentist clean my teeth I will try again

I used up the whole box but my teeth is still yellowish. Maybe it is marginally whiter, but it is definitely not worth the money. I also found that some strips do not stick well to teeth, so it is like falling off the whole time.