Probably the most common type of products that asks me to collaborate would be teeth whitening. Believe it or not, I don't use a lot of teeth whitening products and when I do, it barely does anything to my teeth. I'm usually left with either like a dry mouth or lips.
The directions said to leave it on your teeth between 15-30 minutes, but I'm one of those people that gets impatient so I usually just shoot for 15 minutes, hehe.
I also like how it's compact and you can put the whitening pen anywhere!
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