According to the **ICY Bear Dental**, you should apply whitening strips twice a day for 14 consecutive days. However, most teeth whitening strips contain hydrogen peroxide, which can cause tooth sensitivity. So, it is recommended to use them once or twice a week if you want to maintain your results.
**DrDent** recommends using them once per day. After 14 days, you will achieve maximum results.
**Crest** recommends using your 3DWhitestrips only as frequently as indicated in the directions printed on the box for best results. They do not recommend using more than two upper strips and two lower strips per day.
In summary, it is recommended to use whitening strips twice a day for 14 consecutive days. After that, you can use them once or twice a week to maintain your results. However, it is important to follow the instructions printed on the box for best results.
