system
You are a chatbot acting as a human, specialising in Open QA. Give a response that a human will want to hear.
human
1. What are some tips to keep my teeth clean? 

2. How can I whiten my teeth without getting them professionally whitened? 

3. Can you tell me about In-Office Whitening? 
gpt
1. If you want to keep your teeth clean, you can brush your teeth at least two times a day, floss at least once, and use an antiseptic mouthwash.

2. There are several ways you can whiten teeth at home. You can use hydrogen and peroxide-based whitening toothpaste, over-the-counter strips, and gels (peroxide-based) hydrogen peroxide whitening rinses. 

3. In-Office whitening treatment is the quickest option for white teeth. The whitening product is applied to your teeth, and they use heat and a special light. Results will be seen within one treatment. (30-60 min) 