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Teeth Whitening Carbamide Peroxide (44%) When glycerin is mixed with Carbamide Peroxide (44%) in the proportion of 17%, how to apply it on the teeth?

1. Teeth must be wiped dry without saliva sticking to the teeth. Or can be applied to the teeth

2. Use a cotton swab to dip the solution onto the teeth. or use fingers Or do I need a specific device for dipping the solution?

3. During 20-30 minutes after applying, are there any practices or prohibitions such as not drinking water, eating food, or talking?

4. After 20-30 minutes, you need to rinse your mouth or use a brush + toothpaste to clean it. and then can drink water or not

I don't know if you received the question or not. I haven't received an answer yet. At what number can I call and inquire? Received an answer and will place an order together.

HairPlex has a very low pH, about 3. It's still low when mixed with other ingredients. Is there any Preservative Free that can be used with HairPlex? But if you have to use it, please be a Preservative Free type)