Crest Smile Renewal White Strips

[Cicero]

So I found a carton of these strips on eBay for $30, which is moderately cheap compared to the others. But I have a few concerns, whats the difference between the Smile Renewal White Strips and the Crest 3D White Strips or the Intensive ones? How noticeable are the results? How often do I use this exact brand?

[Brighter.Tomorrow]

They should come with instructions on the back.
My friend Tosha got the normal 3D White Strips, and her's were meant to be used everyday for 6hours. I got the intensive ones, I only had to wear mine 2hours for 1day a week.
Fair warning, they can cause a bit of tooth sensitivity, and will make you salivate more.

[Cicero]

They should come with instructions on the back.
My friend Tosha got the normal 3D White Strips, and her's were meant to be used everyday for 6hours. I got the intensive ones, I only had to wear mine 2hours for 1day a week.
Fair warning, they can cause a bit of tooth sensitivity, and will make you salivate more.

I used the 2 hour express ones. Well, the bunch I got aren't coming in a carton, they're just carton sized.

[Brighter.Tomorrow]

http://www.3dwhite.com/crest-products/2-hour-express-whitestrips.aspx

Go to FAQ. <3

[Cicero]

http://www.3dwhite.com/crest-products/2-hour-express-whitestrips.aspx

Go to FAQ. <3

That's for the 2 hour express, not the smile renewal one

[Origami]

Just a note. I wouldn't recommend using them as often as they say to. Whitening strips do destroy your tooth enamel. This is what causes the sensitivity.

If it says once a week, I'd use it every other week. As such.