How often should I use these teeth whitening strips? There are a total of 42 strips in this product. In the early stages, we recommend continuous use, once a day for 30-60 minutes. After the initial whitening effect is achieved, use the strips 1-2 times every 1 week. How long do they last before the color fades after the whitening effect is achieved? This depends on your diet. If you avoid certain foods and beverages, the whitening effect will last longer. It is recommended to use them every 1 week after the initial whitening effect. Will it affect my daily actions while wearing them? No, it is very convenient to wear the whitening veneers so that you can do whatever you want to do, such as reading a book or watching a TV program! Is this safe for veneers, crowns and dentures? Our strips will only whiten real, natural teeth. They are not formulated to whiten teeth. While our strips are completely safe and will not damage your teeth, they may cause uneven whitening results if you choose to use them. What does this product smell like? Does it smell bad? Our strips are a fresh mint flavor that is to most people's taste, if you don't like the mint flavor you can shop for other flavors!