Can't be any easier :)
I get so excited when I find products that actually do what they say to do, and even more, when I see the results I expect from said products. These whitening pens from Krucasano fit such description. It is really easy to use: by twisting the pen is how the gel floats to the brush, and with clean and dry teeth you want to brush each teeth, not the gum, and let it dry at least 30 seconds, maybe it's a little effort but all worth it, don't eat or drink anything for at least 30 minutes, buy I go longer simply because that's my preference. I try to cover as much exposed teeth I can possibly reach,  and after a few uses, I am starting to notice the yellowish color starting to fade. Highly recommend, makes for a great gift!
Rating: 5 stars