Colgate Optic White Overnight Teeth Whitening Gel Pen, 21 Whitening Treatments, 0.08 oz

I didn't apply it right so I decided to wipe it off and try again. When I began wiping the yellow between my teeth started flaking off. It had only been in for about 10 minutes. My teeth are white but I had some yellowing in between them and this stuff worked great!

[This review was collected as part of a promotion.] By far the best whitening pen! I try different whitening pen like Reach and Active Wow etc. Which cost a lot. Very easy instruction, easy to apply on my teeth and didn't let any residue or starchy feeling, and didn't leave a bad taste in my mouth or any after taste, also no irritation on my gums or teeth, which made my experience better because I have sensitive gums. The packaging caught my eyes, red bright. My only complaint is ran out super fast wish it was more in the bottle. I will buy this product again because I see the change of color on my enamel. I have light yellow teeth, stained from coffee. Help me with a clear smile! 10/10

[This review was collected as part of a promotion.] Wow! This is the best I've ever used! My teeth Are So white,healthy and Super duper clean! I am so impressed that I will be buying !! I highly recommend this awesome product and I am honored to give my honest opinion in exchange for a sample.

[This review was collected as part of a promotion.] I really enjoyed using this Colgate Overnight Whitening Pen! It's my favorite whitening product i've ever used! I love the pen format, it's really easy to use. I also really like that you use it overnight and then brush your teeth in the morning - it fits in with my routine so well and it's just so easy to use you don't even need to think about it. I loved the results, I felt like my smile was whiter and I feel more confident about that.

I love this product for 3 reasons. 1.)You can paint it on your teeth evenly to get a good coating. 2.) you use it at night which does the work for you while you sleep. It's easy. 3.) safe for sensitive teeth and effective. It's safe to use because it doesn't cause sensitivity. It's effective and actually works. I've only used it for 2 days and I can see the difference already. I only gave it a 4 star because of the price and how small the tube is.

[This review was collected as part of a promotion.] I was very impressed by how quickly this product worked. I only had to use it a few times and there was a very noticeable difference. The product was fairly easy to use. You brush your teeth then make sure they are dry. You take the pen and pump it a couple times then paint the gel on your teeth. The whole process only took a couple minutes which was way quicker than other whitening products I have tried. The only thing I would change is if maybe the gel was a different color so you know where it's been applied? It seems like sometimes I over apply and other times I under apply so it's hard to tell.

It's missing half the product.

Watch for slightly damage packages. This item had a little damage on the corner and when we opened it at home the whitening pen was missing. Looks like some stole it in the store. We have groceries delivered so no chance identified the issue until it's too late.

Unfortunately when received package, Colgate box was empty, seems as if whomever packed the box decided to keep it for themselves. Tried going thru customer support for help and got the runaround, love Walmart but will only do pickups.

I wanted to like this product for it's obvious benefits. I normally use Crest products for whitening, but this seemed appealing. However, after the first couple of uses, the pen began to 'clump,' and dry out. Each time I would attempt to rinse the brush, but it would only help to a degree. I would have to click the pen more times than the directions indicated, and I would still end up having to clean the pen again. It left hard dried residue on my teeth, that could only be removed by vigorously brushing my teeth. The price point on this product is absolutely unjustified for its lack of follow-through. Do not waste your money.!