Which Toothpaste is the best for cleaning?

Question: Which toothpaste is the best for cleaning?

Hypothesis: I think Colegate is because it's dentist recommended

Procedure:

1. Buy the toothpastes (3-5 types)

2. Buy marble tiles and put marker on them

3. Purchase toothbrushes

4. Scrub marker off with 10 strokes

5. Record data and rate how we'll it's cleaned rate 1-5

6. Repeat 3 times