I would guess that if they don't tell you to brush before then whatever chemical is in those things can work fine with all the crud on your teeth. Either that or you'll just end up with super ...

With so many options on the market, from LED-powered systems to whitening strips and peroxide ... to whiten their teeth at home, I would recommend you brush your teeth before applying any ...

Toothpaste: It removes surface stains with abrasion and chemical reactions. Rinse: Used after brushing to help whiten teeth ... recommend brushing before applying white strips to remove debris ...

Teeth-whitening ... which can burn gums and cause dental damage. An investigation carried out by Which? tested 36 kits and 21 of them exceeded the legal amount of the chemical for home use while ...

The strips can be uncomfortable to use for sensitive teeth. These gentle whitening strips rely on lemon peel ... bite down, and brush with a wet toothbrush. The fresh mint variety is a naturally ...

As a teenager, I turned to Crest Whitestrips to ... developed a rhythm. Before brushing with toothpaste, I wet my toothbrush, dip it in the powder, and brush my teeth for the recommended two ...