I was a bit disappointed with this product. I felt it really didn't do justice to what it was meant to do. When I tried on the first strip and it failed, I thought maybe I'm just not doing the wrong thing, but when I tried out the second strip on another occasion I knew that this product really wasn't for me, so I gave the other strip to my friend who said it worked well on her, I thought maybe it just works better on some people rather than on others.